diff options
| author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-10-20 00:10:27 -0300 |
|---|---|---|
| committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-10-20 00:10:27 -0300 |
| commit | d0b2f91bede3bd5e3d24dd6803e56eee959c1797 (patch) | |
| tree | 7fee4ab0509879c373c4f2cbd5b8a5be5b4041ee /drivers/tty/serial | |
| parent | e914f8eb445e8f74b00303c19c2ffceaedd16a05 (diff) | |
Linux-libre 4.8.2-gnupck-4.8.2-gnu
Diffstat (limited to 'drivers/tty/serial')
39 files changed, 848 insertions, 382 deletions
diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h index 215a99237..1a16feac9 100644 --- a/drivers/tty/serial/8250/8250.h +++ b/drivers/tty/serial/8250/8250.h @@ -53,11 +53,9 @@ struct old_serial_port { unsigned int port; unsigned int irq; upf_t flags; - unsigned char hub6; unsigned char io_type; unsigned char __iomem *iomem_base; unsigned short iomem_reg_shift; - unsigned long irqflags; }; struct serial8250_config { @@ -131,6 +129,16 @@ void serial8250_rpm_put(struct uart_8250_port *p); int serial8250_em485_init(struct uart_8250_port *p); void serial8250_em485_destroy(struct uart_8250_port *p); +static inline void serial8250_out_MCR(struct uart_8250_port *up, int value) +{ + serial_out(up, UART_MCR, value); +} + +static inline int serial8250_in_MCR(struct uart_8250_port *up) +{ + return serial_in(up, UART_MCR); +} + #if defined(__alpha__) && !defined(CONFIG_PCI) /* * Digital did something really horribly wrong with the OUT1 and OUT2 @@ -237,9 +245,3 @@ static inline int serial_index(struct uart_port *port) { return port->minor - 64; } - -#if 0 -#define DEBUG_INTR(fmt...) printk(fmt) -#else -#define DEBUG_INTR(fmt...) do { } while (0) -#endif diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index 0fbd7c033..dcf43f664 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -114,7 +114,7 @@ static irqreturn_t serial8250_interrupt(int irq, void *dev_id) struct list_head *l, *end = NULL; int pass_counter = 0, handled = 0; - DEBUG_INTR("serial8250_interrupt(%d)...", irq); + pr_debug("%s(%d): start\n", __func__, irq); spin_lock(&i->lock); @@ -144,7 +144,7 @@ static irqreturn_t serial8250_interrupt(int irq, void *dev_id) spin_unlock(&i->lock); - DEBUG_INTR("end.\n"); + pr_debug("%s(%d): end\n", __func__, irq); return IRQ_RETVAL(handled); } @@ -546,10 +546,10 @@ static void __init serial8250_isa_init_ports(void) port->iobase = old_serial_port[i].port; port->irq = irq_canonicalize(old_serial_port[i].irq); - port->irqflags = old_serial_port[i].irqflags; + port->irqflags = 0; port->uartclk = old_serial_port[i].baud_base * 16; port->flags = old_serial_port[i].flags; - port->hub6 = old_serial_port[i].hub6; + port->hub6 = 0; port->membase = old_serial_port[i].iomem_base; port->iotype = old_serial_port[i].io_type; port->regshift = old_serial_port[i].iomem_reg_shift; @@ -675,7 +675,7 @@ static struct console univ8250_console = { .device = uart_console_device, .setup = univ8250_console_setup, .match = univ8250_console_match, - .flags = CON_PRINTBUFFER | CON_ANYTIME, + .flags = CON_PRINTBUFFER | CON_ANYTIME | CON_CONSDEV, .index = -1, .data = &serial8250_reg, }; diff --git a/drivers/tty/serial/8250/8250_dma.c b/drivers/tty/serial/8250/8250_dma.c index 7f33d1c8d..3590d0120 100644 --- a/drivers/tty/serial/8250/8250_dma.c +++ b/drivers/tty/serial/8250/8250_dma.c @@ -145,6 +145,7 @@ void serial8250_rx_dma_flush(struct uart_8250_port *p) dmaengine_terminate_all(dma->rxchan); } } +EXPORT_SYMBOL_GPL(serial8250_rx_dma_flush); int serial8250_request_dma(struct uart_8250_port *p) { diff --git a/drivers/tty/serial/8250/8250_early.c b/drivers/tty/serial/8250/8250_early.c index 8d08ff5c4..85a12f032 100644 --- a/drivers/tty/serial/8250/8250_early.c +++ b/drivers/tty/serial/8250/8250_early.c @@ -150,6 +150,7 @@ EARLYCON_DECLARE(uart, early_serial8250_setup); OF_EARLYCON_DECLARE(ns16550, "ns16550", early_serial8250_setup); OF_EARLYCON_DECLARE(ns16550a, "ns16550a", early_serial8250_setup); OF_EARLYCON_DECLARE(uart, "nvidia,tegra20-uart", early_serial8250_setup); +OF_EARLYCON_DECLARE(uart, "snps,dw-apb-uart", early_serial8250_setup); #ifdef CONFIG_SERIAL_8250_OMAP diff --git a/drivers/tty/serial/8250/8250_fintek.c b/drivers/tty/serial/8250/8250_fintek.c index 870981dd9..0facc789f 100644 --- a/drivers/tty/serial/8250/8250_fintek.c +++ b/drivers/tty/serial/8250/8250_fintek.c @@ -13,6 +13,7 @@ #include <linux/pnp.h> #include <linux/kernel.h> #include <linux/serial_core.h> +#include <linux/irq.h> #include "8250.h" #define ADDR_PORT 0 @@ -30,6 +31,12 @@ #define IO_ADDR2 0x60 #define LDN 0x7 +#define FINTEK_IRQ_MODE 0x70 +#define IRQ_SHARE BIT(4) +#define IRQ_MODE_MASK (BIT(6) | BIT(5)) +#define IRQ_LEVEL_LOW 0 +#define IRQ_EDGE_HIGH BIT(5) + #define RS485 0xF0 #define RTS_INVERT BIT(5) #define RS485_URA BIT(4) @@ -176,10 +183,37 @@ static int find_base_port(struct fintek_8250 *pdata, u16 io_address) return -ENODEV; } +static int fintek_8250_set_irq_mode(struct fintek_8250 *pdata, bool level_mode) +{ + int status; + u8 tmp; + + status = fintek_8250_enter_key(pdata->base_port, pdata->key); + if (status) + return status; + + outb(LDN, pdata->base_port + ADDR_PORT); + outb(pdata->index, pdata->base_port + DATA_PORT); + + outb(FINTEK_IRQ_MODE, pdata->base_port + ADDR_PORT); + tmp = inb(pdata->base_port + DATA_PORT); + + tmp &= ~IRQ_MODE_MASK; + tmp |= IRQ_SHARE; + if (!level_mode) + tmp |= IRQ_EDGE_HIGH; + + outb(tmp, pdata->base_port + DATA_PORT); + fintek_8250_exit_key(pdata->base_port); + return 0; +} + int fintek_8250_probe(struct uart_8250_port *uart) { struct fintek_8250 *pdata; struct fintek_8250 probe_data; + struct irq_data *irq_data = irq_get_irq_data(uart->port.irq); + bool level_mode = irqd_is_level_type(irq_data); if (find_base_port(&probe_data, uart->port.iobase)) return -ENODEV; @@ -192,5 +226,5 @@ int fintek_8250_probe(struct uart_8250_port *uart) uart->port.rs485_config = fintek_8250_rs485_config; uart->port.private_data = pdata; - return 0; + return fintek_8250_set_irq_mode(pdata, level_mode); } diff --git a/drivers/tty/serial/8250/8250_ingenic.c b/drivers/tty/serial/8250/8250_ingenic.c index b0677f610..4d9dc10e2 100644 --- a/drivers/tty/serial/8250/8250_ingenic.c +++ b/drivers/tty/serial/8250/8250_ingenic.c @@ -48,7 +48,6 @@ static const struct of_device_id of_match[]; #define UART_MCR_MDCE BIT(7) #define UART_MCR_FCM BIT(6) -#if defined(CONFIG_SERIAL_EARLYCON) && !defined(MODULE) static struct earlycon_device *early_device; static uint8_t __init early_in(struct uart_port *port, int offset) @@ -141,7 +140,6 @@ OF_EARLYCON_DECLARE(jz4775_uart, "ingenic,jz4775-uart", EARLYCON_DECLARE(jz4780_uart, ingenic_early_console_setup); OF_EARLYCON_DECLARE(jz4780_uart, "ingenic,jz4780-uart", ingenic_early_console_setup); -#endif /* CONFIG_SERIAL_EARLYCON */ static void ingenic_uart_serial_out(struct uart_port *p, int offset, int value) { diff --git a/drivers/tty/serial/8250/8250_mid.c b/drivers/tty/serial/8250/8250_mid.c index 0f50a3f5e..20c5db2f4 100644 --- a/drivers/tty/serial/8250/8250_mid.c +++ b/drivers/tty/serial/8250/8250_mid.c @@ -96,13 +96,27 @@ static int tng_setup(struct mid8250 *mid, struct uart_port *p) static int dnv_handle_irq(struct uart_port *p) { struct mid8250 *mid = p->private_data; + struct uart_8250_port *up = up_to_u8250p(p); unsigned int fisr = serial_port_in(p, INTEL_MID_UART_DNV_FISR); + u32 status; int ret = IRQ_NONE; - - if (fisr & BIT(2)) - ret |= hsu_dma_irq(&mid->dma_chip, 1); - if (fisr & BIT(1)) - ret |= hsu_dma_irq(&mid->dma_chip, 0); + int err; + + if (fisr & BIT(2)) { + err = hsu_dma_get_status(&mid->dma_chip, 1, &status); + if (err > 0) { + serial8250_rx_dma_flush(up); + ret |= IRQ_HANDLED; + } else if (err == 0) + ret |= hsu_dma_do_irq(&mid->dma_chip, 1, status); + } + if (fisr & BIT(1)) { + err = hsu_dma_get_status(&mid->dma_chip, 0, &status); + if (err > 0) + ret |= IRQ_HANDLED; + else if (err == 0) + ret |= hsu_dma_do_irq(&mid->dma_chip, 0, status); + } if (fisr & BIT(0)) ret |= serial8250_handle_irq(p, serial_port_in(p, UART_IIR)); return ret; diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c index 3489fbcb7..3611ec9bb 100644 --- a/drivers/tty/serial/8250/8250_mtk.c +++ b/drivers/tty/serial/8250/8250_mtk.c @@ -301,7 +301,7 @@ static struct platform_driver mtk8250_platform_driver = { }; module_platform_driver(mtk8250_platform_driver); -#if defined(CONFIG_SERIAL_8250_CONSOLE) && !defined(MODULE) +#ifdef CONFIG_SERIAL_8250_CONSOLE static int __init early_mtk8250_setup(struct earlycon_device *device, const char *options) { diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c index 2c44c792d..61ad6c3b2 100644 --- a/drivers/tty/serial/8250/8250_omap.c +++ b/drivers/tty/serial/8250/8250_omap.c @@ -280,7 +280,7 @@ static void omap8250_restore_regs(struct uart_8250_port *up) serial_out(up, UART_EFR, UART_EFR_ECB); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); - serial_out(up, UART_MCR, UART_MCR_TCRTLR); + serial8250_out_MCR(up, UART_MCR_TCRTLR); serial_out(up, UART_FCR, up->fcr); omap8250_update_scr(up, priv); @@ -296,7 +296,7 @@ static void omap8250_restore_regs(struct uart_8250_port *up) serial_out(up, UART_LCR, 0); /* drop TCR + TLR access, we setup XON/XOFF later */ - serial_out(up, UART_MCR, up->mcr); + serial8250_out_MCR(up, up->mcr); serial_out(up, UART_IER, up->ier); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index e67a46301..bc51b32b2 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -1136,11 +1136,11 @@ static int pci_quatech_rqopr(struct uart_8250_port *port) static void pci_quatech_wqopr(struct uart_8250_port *port, u8 qopr) { unsigned long base = port->port.iobase; - u8 LCR, val; + u8 LCR; LCR = inb(base + UART_LCR); outb(0xBF, base + UART_LCR); - val = inb(base + UART_SCR); + inb(base + UART_SCR); outb(qopr, base + UART_SCR); outb(LCR, base + UART_LCR); } @@ -1865,6 +1865,16 @@ pci_wch_ch353_setup(struct serial_private *priv, } static int +pci_wch_ch355_setup(struct serial_private *priv, + const struct pciserial_board *board, + struct uart_8250_port *port, int idx) +{ + port->port.flags |= UPF_FIXED_TYPE; + port->port.type = PORT_16550A; + return pci_default_setup(priv, board, port, idx); +} + +static int pci_wch_ch38x_setup(struct serial_private *priv, const struct pciserial_board *board, struct uart_8250_port *port, int idx) @@ -1915,6 +1925,7 @@ pci_wch_ch38x_setup(struct serial_private *priv, #define PCI_DEVICE_ID_WCH_CH353_2S1PF 0x5046 #define PCI_DEVICE_ID_WCH_CH353_1S1P 0x5053 #define PCI_DEVICE_ID_WCH_CH353_2S1P 0x7053 +#define PCI_DEVICE_ID_WCH_CH355_4S 0x7173 #define PCI_VENDOR_ID_AGESTAR 0x5372 #define PCI_DEVICE_ID_AGESTAR_9375 0x6872 #define PCI_VENDOR_ID_ASIX 0x9710 @@ -2655,6 +2666,14 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = { .subdevice = PCI_ANY_ID, .setup = pci_wch_ch353_setup, }, + /* WCH CH355 4S card (16550 clone) */ + { + .vendor = PCI_VENDOR_ID_WCH, + .device = PCI_DEVICE_ID_WCH_CH355_4S, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + .setup = pci_wch_ch355_setup, + }, /* WCH CH382 2S card (16850 clone) */ { .vendor = PCIE_VENDOR_ID_WCH, @@ -3849,6 +3868,7 @@ static const struct pci_device_id blacklist[] = { /* multi-io cards handled by parport_serial */ { PCI_DEVICE(0x4348, 0x7053), }, /* WCH CH353 2S1P */ { PCI_DEVICE(0x4348, 0x5053), }, /* WCH CH353 1S1P */ + { PCI_DEVICE(0x4348, 0x7173), }, /* WCH CH355 4S */ { PCI_DEVICE(0x1c00, 0x3250), }, /* WCH CH382 2S1P */ { PCI_DEVICE(0x1c00, 0x3470), }, /* WCH CH384 4S */ @@ -5706,6 +5726,10 @@ static struct pci_device_id serial_pci_tbl[] = { PCI_ANY_ID, PCI_ANY_ID, 0, 0, pbn_b0_bt_2_115200 }, + { PCI_VENDOR_ID_WCH, PCI_DEVICE_ID_WCH_CH355_4S, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, pbn_b0_bt_4_115200 }, + { PCIE_VENDOR_ID_WCH, PCIE_DEVICE_ID_WCH_CH382_2S, PCI_ANY_ID, PCI_ANY_ID, 0, 0, pbn_wch382_2 }, diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index d4036038a..bdfa659b9 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -527,13 +527,13 @@ static void serial8250_clear_fifos(struct uart_8250_port *p) static inline void serial8250_em485_rts_after_send(struct uart_8250_port *p) { - unsigned char mcr = serial_in(p, UART_MCR); + unsigned char mcr = serial8250_in_MCR(p); if (p->port.rs485.flags & SER_RS485_RTS_AFTER_SEND) mcr |= UART_MCR_RTS; else mcr &= ~UART_MCR_RTS; - serial_out(p, UART_MCR, mcr); + serial8250_out_MCR(p, mcr); } static void serial8250_em485_handle_start_tx(unsigned long arg); @@ -785,10 +785,10 @@ static int size_fifo(struct uart_8250_port *up) old_lcr = serial_in(up, UART_LCR); serial_out(up, UART_LCR, 0); old_fcr = serial_in(up, UART_FCR); - old_mcr = serial_in(up, UART_MCR); + old_mcr = serial8250_in_MCR(up); serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT); - serial_out(up, UART_MCR, UART_MCR_LOOP); + serial8250_out_MCR(up, UART_MCR_LOOP); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); old_dl = serial_dl_read(up); serial_dl_write(up, 0x0001); @@ -800,7 +800,7 @@ static int size_fifo(struct uart_8250_port *up) (count < 256); count++) serial_in(up, UART_RX); serial_out(up, UART_FCR, old_fcr); - serial_out(up, UART_MCR, old_mcr); + serial8250_out_MCR(up, old_mcr); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); serial_dl_write(up, old_dl); serial_out(up, UART_LCR, old_lcr); @@ -1040,17 +1040,17 @@ static void autoconfig_16550a(struct uart_8250_port *up) * it's changed. If so, set baud_base in EXCR2 to 921600. -- dwmw2 */ serial_out(up, UART_LCR, 0); - status1 = serial_in(up, UART_MCR); + status1 = serial8250_in_MCR(up); serial_out(up, UART_LCR, 0xE0); status2 = serial_in(up, 0x02); /* EXCR1 */ if (!((status2 ^ status1) & UART_MCR_LOOP)) { serial_out(up, UART_LCR, 0); - serial_out(up, UART_MCR, status1 ^ UART_MCR_LOOP); + serial8250_out_MCR(up, status1 ^ UART_MCR_LOOP); serial_out(up, UART_LCR, 0xE0); status2 = serial_in(up, 0x02); /* EXCR1 */ serial_out(up, UART_LCR, 0); - serial_out(up, UART_MCR, status1); + serial8250_out_MCR(up, status1); if ((status2 ^ status1) & UART_MCR_LOOP) { unsigned short quot; @@ -1224,7 +1224,7 @@ static void autoconfig(struct uart_8250_port *up) } } - save_mcr = serial_in(up, UART_MCR); + save_mcr = serial8250_in_MCR(up); save_lcr = serial_in(up, UART_LCR); /* @@ -1237,9 +1237,9 @@ static void autoconfig(struct uart_8250_port *up) * that conflicts with COM 1-4 --- we hope! */ if (!(port->flags & UPF_SKIP_TEST)) { - serial_out(up, UART_MCR, UART_MCR_LOOP | 0x0A); + serial8250_out_MCR(up, UART_MCR_LOOP | 0x0A); status1 = serial_in(up, UART_MSR) & 0xF0; - serial_out(up, UART_MCR, save_mcr); + serial8250_out_MCR(up, save_mcr); if (status1 != 0x90) { spin_unlock_irqrestore(&port->lock, flags); DEBUG_AUTOCONF("LOOP test failed (%02x) ", @@ -1305,7 +1305,7 @@ static void autoconfig(struct uart_8250_port *up) if (port->type == PORT_RSA) serial_out(up, UART_RSA_FRR, 0); #endif - serial_out(up, UART_MCR, save_mcr); + serial8250_out_MCR(up, save_mcr); serial8250_clear_fifos(up); serial_in(up, UART_RX); if (up->capabilities & UART_CAP_UUE) @@ -1353,19 +1353,18 @@ static void autoconfig_irq(struct uart_8250_port *up) /* forget possible initially masked and pending IRQ */ probe_irq_off(probe_irq_on()); - save_mcr = serial_in(up, UART_MCR); + save_mcr = serial8250_in_MCR(up); save_ier = serial_in(up, UART_IER); - serial_out(up, UART_MCR, UART_MCR_OUT1 | UART_MCR_OUT2); + serial8250_out_MCR(up, UART_MCR_OUT1 | UART_MCR_OUT2); irqs = probe_irq_on(); - serial_out(up, UART_MCR, 0); + serial8250_out_MCR(up, 0); udelay(10); if (port->flags & UPF_FOURPORT) { - serial_out(up, UART_MCR, - UART_MCR_DTR | UART_MCR_RTS); + serial8250_out_MCR(up, UART_MCR_DTR | UART_MCR_RTS); } else { - serial_out(up, UART_MCR, - UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2); + serial8250_out_MCR(up, + UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2); } serial_out(up, UART_IER, 0x0f); /* enable all intrs */ serial_in(up, UART_LSR); @@ -1376,7 +1375,7 @@ static void autoconfig_irq(struct uart_8250_port *up) udelay(20); irq = probe_irq_off(irqs); - serial_out(up, UART_MCR, save_mcr); + serial8250_out_MCR(up, save_mcr); serial_out(up, UART_IER, save_ier); if (port->flags & UPF_FOURPORT) @@ -1549,14 +1548,14 @@ static inline void start_tx_rs485(struct uart_port *port) del_timer(&em485->stop_tx_timer); em485->active_timer = NULL; - mcr = serial_in(up, UART_MCR); + mcr = serial8250_in_MCR(up); if (!!(up->port.rs485.flags & SER_RS485_RTS_ON_SEND) != !!(mcr & UART_MCR_RTS)) { if (up->port.rs485.flags & SER_RS485_RTS_ON_SEND) mcr |= UART_MCR_RTS; else mcr &= ~UART_MCR_RTS; - serial_out(up, UART_MCR, mcr); + serial8250_out_MCR(up, mcr); if (up->port.rs485.delay_rts_before_send > 0) { em485->active_timer = &em485->start_tx_timer; @@ -1686,7 +1685,7 @@ static void serial8250_read_char(struct uart_8250_port *up, unsigned char lsr) lsr &= port->read_status_mask; if (lsr & UART_LSR_BI) { - DEBUG_INTR("handling break...."); + pr_debug("%s: handling break\n", __func__); flag = TTY_BREAK; } else if (lsr & UART_LSR_PE) flag = TTY_PARITY; @@ -1757,7 +1756,7 @@ void serial8250_tx_chars(struct uart_8250_port *up) if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) uart_write_wakeup(port); - DEBUG_INTR("THRE..."); + pr_debug("%s: THRE\n", __func__); /* * With RPM enabled, we have to wait until the FIFO is empty before the @@ -1823,7 +1822,7 @@ int serial8250_handle_irq(struct uart_port *port, unsigned int iir) status = serial_port_in(port, UART_LSR); - DEBUG_INTR("status = %x...", status); + pr_debug("%s: status = %x\n", __func__, status); if (status & (UART_LSR_DR | UART_LSR_BI)) { if (!up->dma || handle_rx_dma(up, iir)) @@ -1861,7 +1860,6 @@ static int serial8250_default_handle_irq(struct uart_port *port) */ static int exar_handle_irq(struct uart_port *port) { - unsigned char int0, int1, int2, int3; unsigned int iir = serial_port_in(port, UART_IIR); int ret; @@ -1869,10 +1867,10 @@ static int exar_handle_irq(struct uart_port *port) if ((port->type == PORT_XR17V35X) || (port->type == PORT_XR17D15X)) { - int0 = serial_port_in(port, 0x80); - int1 = serial_port_in(port, 0x81); - int2 = serial_port_in(port, 0x82); - int3 = serial_port_in(port, 0x83); + serial_port_in(port, 0x80); + serial_port_in(port, 0x81); + serial_port_in(port, 0x82); + serial_port_in(port, 0x83); } return ret; @@ -1944,7 +1942,7 @@ void serial8250_do_set_mctrl(struct uart_port *port, unsigned int mctrl) mcr = (mcr & up->mcr_mask) | up->mcr_force | up->mcr; - serial_port_out(port, UART_MCR, mcr); + serial8250_out_MCR(up, mcr); } EXPORT_SYMBOL_GPL(serial8250_do_set_mctrl); @@ -1994,8 +1992,6 @@ static void wait_for_xmitr(struct uart_8250_port *up, int bits) /* Wait up to 1s for flow control if necessary */ if (up->port.flags & UPF_CONS_FLOW) { - unsigned int tmout; - for (tmout = 1000000; tmout; tmout--) { unsigned int msr = serial_in(up, UART_MSR); up->msr_saved_flags |= msr & MSR_SAVE_FLAGS; @@ -3093,7 +3089,7 @@ static void serial8250_console_restore(struct uart_8250_port *up) serial8250_set_divisor(port, baud, quot, frac); serial_port_out(port, UART_LCR, up->lcr); - serial_port_out(port, UART_MCR, UART_MCR_DTR | UART_MCR_RTS); + serial8250_out_MCR(up, UART_MCR_DTR | UART_MCR_RTS); } /* diff --git a/drivers/tty/serial/8250/8250_uniphier.c b/drivers/tty/serial/8250/8250_uniphier.c index efd1f9c04..b8d9c8c9d 100644 --- a/drivers/tty/serial/8250/8250_uniphier.c +++ b/drivers/tty/serial/8250/8250_uniphier.c @@ -35,7 +35,7 @@ struct uniphier8250_priv { spinlock_t atomic_write_lock; }; -#if defined(CONFIG_SERIAL_8250_CONSOLE) && !defined(MODULE) +#ifdef CONFIG_SERIAL_8250_CONSOLE static int __init uniphier_early_console_setup(struct earlycon_device *device, const char *options) { diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index e46761d20..7c6f7afca 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -387,7 +387,8 @@ config SERIAL_8250_MT6577 config SERIAL_8250_UNIPHIER tristate "Support for UniPhier on-chip UART" - depends on SERIAL_8250 && ARCH_UNIPHIER + depends on SERIAL_8250 + depends on ARCH_UNIPHIER || COMPILE_TEST help If you have a UniPhier based board and want to use the on-chip serial ports, say Y to this option. If unsure, say N. @@ -395,7 +396,7 @@ config SERIAL_8250_UNIPHIER config SERIAL_8250_INGENIC tristate "Support for Ingenic SoC serial ports" depends on SERIAL_8250 - depends on (OF_FLATTREE && SERIAL_8250_CONSOLE) || !SERIAL_EARLYCON + depends on OF_FLATTREE depends on MIPS || COMPILE_TEST help If you have a system using an Ingenic SoC and wish to make use of diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 7e3a58c8b..518db24a5 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -736,6 +736,7 @@ config SERIAL_SH_SCI tristate "SuperH SCI(F) serial port support" depends on SUPERH || ARCH_RENESAS || H8300 || COMPILE_TEST select SERIAL_CORE + select SERIAL_MCTRL_GPIO if GPIOLIB config SERIAL_SH_SCI_NR_UARTS int "Maximum number of SCI(F) serial ports" @@ -1477,7 +1478,7 @@ config SERIAL_MPS2_UART_CONSOLE config SERIAL_MPS2_UART bool "MPS2 UART port" - depends on ARM || COMPILE_TEST + depends on ARCH_MPS2 || COMPILE_TEST select SERIAL_CORE help This driver support the UART ports on ARM MPS2. diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 1b7331e40..8a9e21338 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -2553,11 +2553,17 @@ static int sbsa_uart_probe(struct platform_device *pdev) if (!uap) return -ENOMEM; + ret = platform_get_irq(pdev, 0); + if (ret < 0) { + dev_err(&pdev->dev, "cannot obtain irq\n"); + return ret; + } + uap->port.irq = ret; + uap->reg_offset = vendor_sbsa.reg_offset; uap->vendor = &vendor_sbsa; uap->fifosize = 32; uap->port.iotype = vendor_sbsa.access_32b ? UPIO_MEM32 : UPIO_MEM; - uap->port.irq = platform_get_irq(pdev, 0); uap->port.ops = &sbsa_uart_pops; uap->fixed_baud = baudrate; diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c index 1519d2ca7..73137f4aa 100644 --- a/drivers/tty/serial/ar933x_uart.c +++ b/drivers/tty/serial/ar933x_uart.c @@ -54,7 +54,7 @@ struct ar933x_uart_port { static inline bool ar933x_uart_console_enabled(void) { - return config_enabled(CONFIG_SERIAL_AR933X_CONSOLE); + return IS_ENABLED(CONFIG_SERIAL_AR933X_CONSOLE); } static inline unsigned int ar933x_uart_read(struct ar933x_uart_port *up, @@ -636,7 +636,7 @@ static int ar933x_uart_probe(struct platform_device *pdev) int ret; np = pdev->dev.of_node; - if (config_enabled(CONFIG_OF) && np) { + if (IS_ENABLED(CONFIG_OF) && np) { id = of_alias_get_id(np, "serial"); if (id < 0) { dev_err(&pdev->dev, "unable to get alias id, err=%d\n", diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c index f9c798cba..2eaa18dde 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -108,6 +108,12 @@ struct atmel_uart_char { u16 ch; }; +/* + * Be careful, the real size of the ring buffer is + * sizeof(atmel_uart_char) * ATMEL_SERIAL_RINGSIZE. It means that ring buffer + * can contain up to 1024 characters in PIO mode and up to 4096 characters in + * DMA mode. + */ #define ATMEL_SERIAL_RINGSIZE 1024 /* @@ -145,10 +151,10 @@ struct atmel_uart_port { dma_cookie_t cookie_rx; struct scatterlist sg_tx; struct scatterlist sg_rx; - struct tasklet_struct tasklet; - unsigned int irq_status; + struct tasklet_struct tasklet_rx; + struct tasklet_struct tasklet_tx; + atomic_t tasklet_shutdown; unsigned int irq_status_prev; - unsigned int status_change; unsigned int tx_len; struct circ_buf rx_ring; @@ -281,6 +287,13 @@ static bool atmel_use_fifo(struct uart_port *port) return atmel_port->fifo_size; } +static void atmel_tasklet_schedule(struct atmel_uart_port *atmel_port, + struct tasklet_struct *t) +{ + if (!atomic_read(&atmel_port->tasklet_shutdown)) + tasklet_schedule(t); +} + static unsigned int atmel_get_lines_status(struct uart_port *port) { struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); @@ -712,7 +725,7 @@ static void atmel_rx_chars(struct uart_port *port) status = atmel_uart_readl(port, ATMEL_US_CSR); } - tasklet_schedule(&atmel_port->tasklet); + atmel_tasklet_schedule(atmel_port, &atmel_port->tasklet_rx); } /* @@ -783,7 +796,7 @@ static void atmel_complete_tx_dma(void *arg) * remaining data from the beginning of xmit->buf to xmit->head. */ if (!uart_circ_empty(xmit)) - tasklet_schedule(&atmel_port->tasklet); + atmel_tasklet_schedule(atmel_port, &atmel_port->tasklet_tx); spin_unlock_irqrestore(&port->lock, flags); } @@ -968,7 +981,7 @@ static void atmel_complete_rx_dma(void *arg) struct uart_port *port = arg; struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - tasklet_schedule(&atmel_port->tasklet); + atmel_tasklet_schedule(atmel_port, &atmel_port->tasklet_rx); } static void atmel_release_rx_dma(struct uart_port *port) @@ -1008,7 +1021,7 @@ static void atmel_rx_from_dma(struct uart_port *port) if (dmastat == DMA_ERROR) { dev_dbg(port->dev, "Get residue error, restart tasklet\n"); atmel_uart_writel(port, ATMEL_US_IER, ATMEL_US_TIMEOUT); - tasklet_schedule(&atmel_port->tasklet); + atmel_tasklet_schedule(atmel_port, &atmel_port->tasklet_rx); return; } @@ -1162,8 +1175,11 @@ static void atmel_uart_timer_callback(unsigned long data) struct uart_port *port = (void *)data; struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - tasklet_schedule(&atmel_port->tasklet); - mod_timer(&atmel_port->uart_timer, jiffies + uart_poll_timeout(port)); + if (!atomic_read(&atmel_port->tasklet_shutdown)) { + tasklet_schedule(&atmel_port->tasklet_rx); + mod_timer(&atmel_port->uart_timer, + jiffies + uart_poll_timeout(port)); + } } /* @@ -1185,7 +1201,8 @@ atmel_handle_receive(struct uart_port *port, unsigned int pending) if (pending & (ATMEL_US_ENDRX | ATMEL_US_TIMEOUT)) { atmel_uart_writel(port, ATMEL_US_IDR, (ATMEL_US_ENDRX | ATMEL_US_TIMEOUT)); - tasklet_schedule(&atmel_port->tasklet); + atmel_tasklet_schedule(atmel_port, + &atmel_port->tasklet_rx); } if (pending & (ATMEL_US_RXBRK | ATMEL_US_OVRE | @@ -1197,7 +1214,8 @@ atmel_handle_receive(struct uart_port *port, unsigned int pending) if (pending & ATMEL_US_TIMEOUT) { atmel_uart_writel(port, ATMEL_US_IDR, ATMEL_US_TIMEOUT); - tasklet_schedule(&atmel_port->tasklet); + atmel_tasklet_schedule(atmel_port, + &atmel_port->tasklet_rx); } } @@ -1227,7 +1245,7 @@ atmel_handle_transmit(struct uart_port *port, unsigned int pending) /* Either PDC or interrupt transmission */ atmel_uart_writel(port, ATMEL_US_IDR, atmel_port->tx_done_mask); - tasklet_schedule(&atmel_port->tasklet); + atmel_tasklet_schedule(atmel_port, &atmel_port->tasklet_tx); } } @@ -1239,14 +1257,27 @@ atmel_handle_status(struct uart_port *port, unsigned int pending, unsigned int status) { struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + unsigned int status_change; if (pending & (ATMEL_US_RIIC | ATMEL_US_DSRIC | ATMEL_US_DCDIC | ATMEL_US_CTSIC)) { - atmel_port->irq_status = status; - atmel_port->status_change = atmel_port->irq_status ^ - atmel_port->irq_status_prev; + status_change = status ^ atmel_port->irq_status_prev; atmel_port->irq_status_prev = status; - tasklet_schedule(&atmel_port->tasklet); + + if (status_change & (ATMEL_US_RI | ATMEL_US_DSR + | ATMEL_US_DCD | ATMEL_US_CTS)) { + /* TODO: All reads to CSR will clear these interrupts! */ + if (status_change & ATMEL_US_RI) + port->icount.rng++; + if (status_change & ATMEL_US_DSR) + port->icount.dsr++; + if (status_change & ATMEL_US_DCD) + uart_handle_dcd_change(port, !(status & ATMEL_US_DCD)); + if (status_change & ATMEL_US_CTS) + uart_handle_cts_change(port, !(status & ATMEL_US_CTS)); + + wake_up_interruptible(&port->state->port.delta_msr_wait); + } } } @@ -1573,37 +1604,25 @@ static int atmel_prepare_rx_pdc(struct uart_port *port) /* * tasklet handling tty stuff outside the interrupt handler. */ -static void atmel_tasklet_func(unsigned long data) +static void atmel_tasklet_rx_func(unsigned long data) { struct uart_port *port = (struct uart_port *)data; struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - unsigned int status = atmel_port->irq_status; - unsigned int status_change = atmel_port->status_change; /* The interrupt handler does not take the lock */ spin_lock(&port->lock); - - atmel_port->schedule_tx(port); - - if (status_change & (ATMEL_US_RI | ATMEL_US_DSR - | ATMEL_US_DCD | ATMEL_US_CTS)) { - /* TODO: All reads to CSR will clear these interrupts! */ - if (status_change & ATMEL_US_RI) - port->icount.rng++; - if (status_change & ATMEL_US_DSR) - port->icount.dsr++; - if (status_change & ATMEL_US_DCD) - uart_handle_dcd_change(port, !(status & ATMEL_US_DCD)); - if (status_change & ATMEL_US_CTS) - uart_handle_cts_change(port, !(status & ATMEL_US_CTS)); - - wake_up_interruptible(&port->state->port.delta_msr_wait); - - atmel_port->status_change = 0; - } - atmel_port->schedule_rx(port); + spin_unlock(&port->lock); +} +static void atmel_tasklet_tx_func(unsigned long data) +{ + struct uart_port *port = (struct uart_port *)data; + struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + + /* The interrupt handler does not take the lock */ + spin_lock(&port->lock); + atmel_port->schedule_tx(port); spin_unlock(&port->lock); } @@ -1787,7 +1806,11 @@ static int atmel_startup(struct uart_port *port) return retval; } - tasklet_enable(&atmel_port->tasklet); + atomic_set(&atmel_port->tasklet_shutdown, 0); + tasklet_init(&atmel_port->tasklet_rx, atmel_tasklet_rx_func, + (unsigned long)port); + tasklet_init(&atmel_port->tasklet_tx, atmel_tasklet_tx_func, + (unsigned long)port); /* * Initialize DMA (if necessary) @@ -1835,7 +1858,6 @@ static int atmel_startup(struct uart_port *port) /* Save current CSR for comparison in atmel_tasklet_func() */ atmel_port->irq_status_prev = atmel_get_lines_status(port); - atmel_port->irq_status = atmel_port->irq_status_prev; /* * Finally, enable the serial port @@ -1907,29 +1929,36 @@ static void atmel_shutdown(struct uart_port *port) { struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + /* Disable interrupts at device level */ + atmel_uart_writel(port, ATMEL_US_IDR, -1); + + /* Prevent spurious interrupts from scheduling the tasklet */ + atomic_inc(&atmel_port->tasklet_shutdown); + /* * Prevent any tasklets being scheduled during * cleanup */ del_timer_sync(&atmel_port->uart_timer); + /* Make sure that no interrupt is on the fly */ + synchronize_irq(port->irq); + /* * Clear out any scheduled tasklets before * we destroy the buffers */ - tasklet_disable(&atmel_port->tasklet); - tasklet_kill(&atmel_port->tasklet); + tasklet_kill(&atmel_port->tasklet_rx); + tasklet_kill(&atmel_port->tasklet_tx); /* * Ensure everything is stopped and - * disable all interrupts, port and break condition. + * disable port and break condition. */ atmel_stop_rx(port); atmel_stop_tx(port); atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_RSTSTA); - atmel_uart_writel(port, ATMEL_US_IDR, -1); - /* * Shut-down the DMA. @@ -2313,10 +2342,6 @@ static int atmel_init_port(struct atmel_uart_port *atmel_port, port->irq = pdev->resource[1].start; port->rs485_config = atmel_config_rs485; - tasklet_init(&atmel_port->tasklet, atmel_tasklet_func, - (unsigned long)port); - tasklet_disable(&atmel_port->tasklet); - memset(&atmel_port->rx_ring, 0, sizeof(atmel_port->rx_ring)); if (pdata && pdata->regs) { @@ -2701,6 +2726,7 @@ static int atmel_serial_probe(struct platform_device *pdev) atmel_port->uart.line = ret; atmel_serial_probe_fifos(atmel_port, pdev); + atomic_set(&atmel_port->tasklet_shutdown, 0); spin_lock_init(&atmel_port->lock_suspended); ret = atmel_init_port(atmel_port, pdev); @@ -2797,7 +2823,8 @@ static int atmel_serial_remove(struct platform_device *pdev) struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); int ret = 0; - tasklet_kill(&atmel_port->tasklet); + tasklet_kill(&atmel_port->tasklet_rx); + tasklet_kill(&atmel_port->tasklet_tx); device_init_wakeup(&pdev->dev, 0); diff --git a/drivers/tty/serial/bcm63xx_uart.c b/drivers/tty/serial/bcm63xx_uart.c index c28e5c24d..5108fab95 100644 --- a/drivers/tty/serial/bcm63xx_uart.c +++ b/drivers/tty/serial/bcm63xx_uart.c @@ -813,8 +813,12 @@ static int bcm_uart_probe(struct platform_device *pdev) struct clk *clk; int ret; - if (pdev->dev.of_node) - pdev->id = of_alias_get_id(pdev->dev.of_node, "uart"); + if (pdev->dev.of_node) { + pdev->id = of_alias_get_id(pdev->dev.of_node, "serial"); + + if (pdev->id < 0) + pdev->id = of_alias_get_id(pdev->dev.of_node, "uart"); + } if (pdev->id < 0 || pdev->id >= BCM63XX_NR_UARTS) return -EINVAL; diff --git a/drivers/tty/serial/clps711x.c b/drivers/tty/serial/clps711x.c index 5beafd2d2..ac1328629 100644 --- a/drivers/tty/serial/clps711x.c +++ b/drivers/tty/serial/clps711x.c @@ -539,7 +539,7 @@ static int uart_clps711x_remove(struct platform_device *pdev) } static const struct of_device_id __maybe_unused clps711x_uart_dt_ids[] = { - { .compatible = "cirrus,clps711x-uart", }, + { .compatible = "cirrus,ep7209-uart", }, { } }; MODULE_DEVICE_TABLE(of, clps711x_uart_dt_ids); diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 3d7900337..7f95f782a 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -1830,7 +1830,13 @@ static int lpuart_probe(struct platform_device *pdev) sport->port.dev = &pdev->dev; sport->port.type = PORT_LPUART; sport->port.iotype = UPIO_MEM; - sport->port.irq = platform_get_irq(pdev, 0); + ret = platform_get_irq(pdev, 0); + if (ret < 0) { + dev_err(&pdev->dev, "cannot obtain irq\n"); + return ret; + } + sport->port.irq = ret; + if (sport->lpuart32) sport->port.ops = &lpuart32_pops; else diff --git a/drivers/tty/serial/m32r_sio.c b/drivers/tty/serial/m32r_sio.c index 68765f7c2..218b7118e 100644 --- a/drivers/tty/serial/m32r_sio.c +++ b/drivers/tty/serial/m32r_sio.c @@ -30,7 +30,6 @@ #define SUPPORT_SYSRQ #endif -#include <linux/module.h> #include <linux/tty.h> #include <linux/tty_flip.h> #include <linux/ioport.h> @@ -51,9 +50,6 @@ #define PASS_LIMIT 256 -/* Standard COM flags */ -#define STD_COM_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST) - static const struct { unsigned int port; unsigned int irq; @@ -892,7 +888,7 @@ static void __init m32r_sio_init_ports(void) up->port.iobase = old_serial_port[i].port; up->port.irq = irq_canonicalize(old_serial_port[i].irq); up->port.uartclk = BAUD_RATE * 16; - up->port.flags = STD_COM_FLAGS; + up->port.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST; up->port.membase = 0; up->port.iotype = 0; up->port.regshift = 0; @@ -1060,19 +1056,4 @@ static int __init m32r_sio_init(void) return ret; } - -static void __exit m32r_sio_exit(void) -{ - int i; - - for (i = 0; i < UART_NR; i++) - uart_remove_one_port(&m32r_sio_reg, &m32r_sio_ports[i].port); - - uart_unregister_driver(&m32r_sio_reg); -} - -module_init(m32r_sio_init); -module_exit(m32r_sio_exit); - -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("Generic M32R SIO serial driver"); +device_initcall(m32r_sio_init); diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c index 3f6e0ab72..9360801df 100644 --- a/drivers/tty/serial/max310x.c +++ b/drivers/tty/serial/max310x.c @@ -1,7 +1,7 @@ /* * Maxim (Dallas) MAX3107/8/9, MAX14830 serial driver * - * Copyright (C) 2012-2014 Alexander Shiyan <shc_work@mail.ru> + * Copyright (C) 2012-2016 Alexander Shiyan <shc_work@mail.ru> * * Based on max3100.c, by Christian Pellegrin <chripell@evolware.org> * Based on max3110.c, by Feng Tang <feng.tang@intel.com> @@ -32,6 +32,7 @@ #define MAX310X_NAME "max310x" #define MAX310X_MAJOR 204 #define MAX310X_MINOR 209 +#define MAX310X_UART_NRMAX 16 /* MAX310X register definitions */ #define MAX310X_RHR_REG (0x00) /* RX FIFO */ @@ -155,10 +156,6 @@ #define MAX310X_LCR_FORCEPARITY_BIT (1 << 5) /* 9-bit multidrop parity */ #define MAX310X_LCR_TXBREAK_BIT (1 << 6) /* TX break enable */ #define MAX310X_LCR_RTS_BIT (1 << 7) /* RTS pin control */ -#define MAX310X_LCR_WORD_LEN_5 (0x00) -#define MAX310X_LCR_WORD_LEN_6 (0x01) -#define MAX310X_LCR_WORD_LEN_7 (0x02) -#define MAX310X_LCR_WORD_LEN_8 (0x03) /* IRDA register bits */ #define MAX310X_IRDA_IRDAEN_BIT (1 << 0) /* IRDA mode enable */ @@ -262,10 +259,10 @@ struct max310x_one { struct uart_port port; struct work_struct tx_work; struct work_struct md_work; + struct work_struct rs_work; }; struct max310x_port { - struct uart_driver uart; struct max310x_devtype *devtype; struct regmap *regmap; struct mutex mutex; @@ -276,6 +273,17 @@ struct max310x_port { struct max310x_one p[0]; }; +static struct uart_driver max310x_uart = { + .owner = THIS_MODULE, + .driver_name = MAX310X_NAME, + .dev_name = "ttyMAX", + .major = MAX310X_MAJOR, + .minor = MAX310X_MINOR, + .nr = MAX310X_UART_NRMAX, +}; + +static DECLARE_BITMAP(max310x_lines, MAX310X_UART_NRMAX); + static u8 max310x_port_read(struct uart_port *port, u8 reg) { struct max310x_port *s = dev_get_drvdata(port->dev); @@ -594,9 +602,7 @@ static void max310x_handle_rx(struct uart_port *port, unsigned int rxlen) unsigned int sts, ch, flag; if (unlikely(rxlen >= port->fifosize)) { - dev_warn_ratelimited(port->dev, - "Port %i: Possible RX FIFO overrun\n", - port->line); + dev_warn_ratelimited(port->dev, "Possible RX FIFO overrun\n"); port->icount.buf_overrun++; /* Ensure sanity of RX level */ rxlen = port->fifosize; @@ -715,13 +721,13 @@ static irqreturn_t max310x_ist(int irq, void *dev_id) { struct max310x_port *s = (struct max310x_port *)dev_id; - if (s->uart.nr > 1) { + if (s->devtype->nr > 1) { do { unsigned int val = ~0; WARN_ON_ONCE(regmap_read(s->regmap, MAX310X_GLOBALIRQ_REG, &val)); - val = ((1 << s->uart.nr) - 1) & ~val; + val = ((1 << s->devtype->nr) - 1) & ~val; if (!val) break; max310x_port_irq(s, fls(val) - 1); @@ -796,7 +802,7 @@ static void max310x_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old) { - unsigned int lcr, flow = 0; + unsigned int lcr = 0, flow = 0; int baud; /* Mask termios capabilities we don't support */ @@ -805,17 +811,16 @@ static void max310x_set_termios(struct uart_port *port, /* Word size */ switch (termios->c_cflag & CSIZE) { case CS5: - lcr = MAX310X_LCR_WORD_LEN_5; break; case CS6: - lcr = MAX310X_LCR_WORD_LEN_6; + lcr = MAX310X_LCR_LENGTH0_BIT; break; case CS7: - lcr = MAX310X_LCR_WORD_LEN_7; + lcr = MAX310X_LCR_LENGTH1_BIT; break; case CS8: default: - lcr = MAX310X_LCR_WORD_LEN_8; + lcr = MAX310X_LCR_LENGTH1_BIT | MAX310X_LCR_LENGTH0_BIT; break; } @@ -877,36 +882,45 @@ static void max310x_set_termios(struct uart_port *port, uart_update_timeout(port, termios->c_cflag, baud); } -static int max310x_rs485_config(struct uart_port *port, - struct serial_rs485 *rs485) +static void max310x_rs_proc(struct work_struct *ws) { + struct max310x_one *one = container_of(ws, struct max310x_one, rs_work); unsigned int val; - if (rs485->delay_rts_before_send > 0x0f || - rs485->delay_rts_after_send > 0x0f) - return -ERANGE; + val = (one->port.rs485.delay_rts_before_send << 4) | + one->port.rs485.delay_rts_after_send; + max310x_port_write(&one->port, MAX310X_HDPIXDELAY_REG, val); - val = (rs485->delay_rts_before_send << 4) | - rs485->delay_rts_after_send; - max310x_port_write(port, MAX310X_HDPIXDELAY_REG, val); - if (rs485->flags & SER_RS485_ENABLED) { - max310x_port_update(port, MAX310X_MODE1_REG, + if (one->port.rs485.flags & SER_RS485_ENABLED) { + max310x_port_update(&one->port, MAX310X_MODE1_REG, MAX310X_MODE1_TRNSCVCTRL_BIT, MAX310X_MODE1_TRNSCVCTRL_BIT); - max310x_port_update(port, MAX310X_MODE2_REG, + max310x_port_update(&one->port, MAX310X_MODE2_REG, MAX310X_MODE2_ECHOSUPR_BIT, MAX310X_MODE2_ECHOSUPR_BIT); } else { - max310x_port_update(port, MAX310X_MODE1_REG, + max310x_port_update(&one->port, MAX310X_MODE1_REG, MAX310X_MODE1_TRNSCVCTRL_BIT, 0); - max310x_port_update(port, MAX310X_MODE2_REG, + max310x_port_update(&one->port, MAX310X_MODE2_REG, MAX310X_MODE2_ECHOSUPR_BIT, 0); } +} + +static int max310x_rs485_config(struct uart_port *port, + struct serial_rs485 *rs485) +{ + struct max310x_one *one = container_of(port, struct max310x_one, port); + + if ((rs485->delay_rts_before_send > 0x0f) || + (rs485->delay_rts_after_send > 0x0f)) + return -ERANGE; rs485->flags &= SER_RS485_RTS_ON_SEND | SER_RS485_ENABLED; memset(rs485->padding, 0, sizeof(rs485->padding)); port->rs485 = *rs485; + schedule_work(&one->rs_work); + return 0; } @@ -1009,8 +1023,8 @@ static int __maybe_unused max310x_suspend(struct device *dev) struct max310x_port *s = dev_get_drvdata(dev); int i; - for (i = 0; i < s->uart.nr; i++) { - uart_suspend_port(&s->uart, &s->p[i].port); + for (i = 0; i < s->devtype->nr; i++) { + uart_suspend_port(&max310x_uart, &s->p[i].port); s->devtype->power(&s->p[i].port, 0); } @@ -1022,9 +1036,9 @@ static int __maybe_unused max310x_resume(struct device *dev) struct max310x_port *s = dev_get_drvdata(dev); int i; - for (i = 0; i < s->uart.nr; i++) { + for (i = 0; i < s->devtype->nr; i++) { s->devtype->power(&s->p[i].port, 1); - uart_resume_port(&s->uart, &s->p[i].port); + uart_resume_port(&max310x_uart, &s->p[i].port); } return 0; @@ -1159,18 +1173,6 @@ static int max310x_probe(struct device *dev, struct max310x_devtype *devtype, uartclk = max310x_set_ref_clk(s, freq, xtal); dev_dbg(dev, "Reference clock set to %i Hz\n", uartclk); - /* Register UART driver */ - s->uart.owner = THIS_MODULE; - s->uart.dev_name = "ttyMAX"; - s->uart.major = MAX310X_MAJOR; - s->uart.minor = MAX310X_MINOR; - s->uart.nr = devtype->nr; - ret = uart_register_driver(&s->uart); - if (ret) { - dev_err(dev, "Registering UART driver failed\n"); - goto out_clk; - } - #ifdef CONFIG_GPIOLIB /* Setup GPIO cotroller */ s->gpio.owner = THIS_MODULE; @@ -1183,16 +1185,24 @@ static int max310x_probe(struct device *dev, struct max310x_devtype *devtype, s->gpio.base = -1; s->gpio.ngpio = devtype->nr * 4; s->gpio.can_sleep = 1; - ret = gpiochip_add_data(&s->gpio, s); + ret = devm_gpiochip_add_data(dev, &s->gpio, s); if (ret) - goto out_uart; + goto out_clk; #endif mutex_init(&s->mutex); for (i = 0; i < devtype->nr; i++) { + unsigned int line; + + line = find_first_zero_bit(max310x_lines, MAX310X_UART_NRMAX); + if (line == MAX310X_UART_NRMAX) { + ret = -ERANGE; + goto out_uart; + } + /* Initialize port data */ - s->p[i].port.line = i; + s->p[i].port.line = line; s->p[i].port.dev = dev; s->p[i].port.irq = irq; s->p[i].port.type = PORT_MAX310X; @@ -1214,10 +1224,19 @@ static int max310x_probe(struct device *dev, struct max310x_devtype *devtype, MAX310X_MODE1_IRQSEL_BIT); /* Initialize queue for start TX */ INIT_WORK(&s->p[i].tx_work, max310x_wq_proc); - /* Initialize queue for changing mode */ + /* Initialize queue for changing LOOPBACK mode */ INIT_WORK(&s->p[i].md_work, max310x_md_proc); + /* Initialize queue for changing RS485 mode */ + INIT_WORK(&s->p[i].rs_work, max310x_rs_proc); + /* Register port */ - uart_add_one_port(&s->uart, &s->p[i].port); + ret = uart_add_one_port(&max310x_uart, &s->p[i].port); + if (ret) { + s->p[i].port.dev = NULL; + goto out_uart; + } + set_bit(line, max310x_lines); + /* Go to suspend mode */ devtype->power(&s->p[i].port, 0); } @@ -1230,14 +1249,15 @@ static int max310x_probe(struct device *dev, struct max310x_devtype *devtype, dev_err(dev, "Unable to reguest IRQ %i\n", irq); - mutex_destroy(&s->mutex); - -#ifdef CONFIG_GPIOLIB - gpiochip_remove(&s->gpio); - out_uart: -#endif - uart_unregister_driver(&s->uart); + for (i = 0; i < devtype->nr; i++) { + if (s->p[i].port.dev) { + uart_remove_one_port(&max310x_uart, &s->p[i].port); + clear_bit(s->p[i].port.line, max310x_lines); + } + } + + mutex_destroy(&s->mutex); out_clk: clk_disable_unprepare(s->clk); @@ -1250,19 +1270,16 @@ static int max310x_remove(struct device *dev) struct max310x_port *s = dev_get_drvdata(dev); int i; -#ifdef CONFIG_GPIOLIB - gpiochip_remove(&s->gpio); -#endif - - for (i = 0; i < s->uart.nr; i++) { + for (i = 0; i < s->devtype->nr; i++) { cancel_work_sync(&s->p[i].tx_work); cancel_work_sync(&s->p[i].md_work); - uart_remove_one_port(&s->uart, &s->p[i].port); + cancel_work_sync(&s->p[i].rs_work); + uart_remove_one_port(&max310x_uart, &s->p[i].port); + clear_bit(s->p[i].port.line, max310x_lines); s->devtype->power(&s->p[i].port, 0); } mutex_destroy(&s->mutex); - uart_unregister_driver(&s->uart); clk_disable_unprepare(s->clk); return 0; @@ -1335,7 +1352,7 @@ static const struct spi_device_id max310x_id_table[] = { }; MODULE_DEVICE_TABLE(spi, max310x_id_table); -static struct spi_driver max310x_uart_driver = { +static struct spi_driver max310x_spi_driver = { .driver = { .name = MAX310X_NAME, .of_match_table = of_match_ptr(max310x_dt_ids), @@ -1345,9 +1362,36 @@ static struct spi_driver max310x_uart_driver = { .remove = max310x_spi_remove, .id_table = max310x_id_table, }; -module_spi_driver(max310x_uart_driver); #endif +static int __init max310x_uart_init(void) +{ + int ret; + + bitmap_zero(max310x_lines, MAX310X_UART_NRMAX); + + ret = uart_register_driver(&max310x_uart); + if (ret) + return ret; + +#ifdef CONFIG_SPI_MASTER + spi_register_driver(&max310x_spi_driver); +#endif + + return 0; +} +module_init(max310x_uart_init); + +static void __exit max310x_uart_exit(void) +{ +#ifdef CONFIG_SPI_MASTER + spi_unregister_driver(&max310x_spi_driver); +#endif + + uart_unregister_driver(&max310x_uart); +} +module_exit(max310x_uart_exit); + MODULE_LICENSE("GPL"); MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>"); MODULE_DESCRIPTION("MAX310X serial driver"); diff --git a/drivers/tty/serial/mps2-uart.c b/drivers/tty/serial/mps2-uart.c index da9e27d3c..492ec4b37 100644 --- a/drivers/tty/serial/mps2-uart.c +++ b/drivers/tty/serial/mps2-uart.c @@ -1,4 +1,6 @@ /* + * MPS2 UART driver + * * Copyright (C) 2015 ARM Limited * * Author: Vladimir Murzin <vladimir.murzin@arm.com> @@ -17,7 +19,6 @@ #include <linux/console.h> #include <linux/io.h> #include <linux/kernel.h> -#include <linux/module.h> #include <linux/of_device.h> #include <linux/of.h> #include <linux/platform_device.h> @@ -569,30 +570,20 @@ static int mps2_serial_probe(struct platform_device *pdev) return 0; } -static int mps2_serial_remove(struct platform_device *pdev) -{ - struct mps2_uart_port *mps_port = platform_get_drvdata(pdev); - - uart_remove_one_port(&mps2_uart_driver, &mps_port->port); - - return 0; -} - #ifdef CONFIG_OF static const struct of_device_id mps2_match[] = { { .compatible = "arm,mps2-uart", }, {}, }; -MODULE_DEVICE_TABLE(of, mps2_match); #endif static struct platform_driver mps2_serial_driver = { .probe = mps2_serial_probe, - .remove = mps2_serial_remove, .driver = { .name = DRIVER_NAME, .of_match_table = of_match_ptr(mps2_match), + .suppress_bind_attrs = true, }, }; @@ -610,16 +601,4 @@ static int __init mps2_uart_init(void) return ret; } -module_init(mps2_uart_init); - -static void __exit mps2_uart_exit(void) -{ - platform_driver_unregister(&mps2_serial_driver); - uart_unregister_driver(&mps2_uart_driver); -} -module_exit(mps2_uart_exit); - -MODULE_AUTHOR("Vladimir Murzin <vladimir.murzin@arm.com>"); -MODULE_DESCRIPTION("MPS2 UART driver"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("platform:" DRIVER_NAME); +arch_initcall(mps2_uart_init); diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c index 7d62610d9..7312e7e01 100644 --- a/drivers/tty/serial/msm_serial.c +++ b/drivers/tty/serial/msm_serial.c @@ -19,33 +19,147 @@ # define SUPPORT_SYSRQ #endif +#include <linux/kernel.h> #include <linux/atomic.h> #include <linux/dma-mapping.h> #include <linux/dmaengine.h> -#include <linux/hrtimer.h> #include <linux/module.h> #include <linux/io.h> #include <linux/ioport.h> -#include <linux/irq.h> +#include <linux/interrupt.h> #include <linux/init.h> #include <linux/console.h> #include <linux/tty.h> #include <linux/tty_flip.h> #include <linux/serial_core.h> -#include <linux/serial.h> #include <linux/slab.h> #include <linux/clk.h> #include <linux/platform_device.h> #include <linux/delay.h> #include <linux/of.h> #include <linux/of_device.h> - -#include "msm_serial.h" - -#define UARTDM_BURST_SIZE 16 /* in bytes */ -#define UARTDM_TX_AIGN(x) ((x) & ~0x3) /* valid for > 1p3 */ -#define UARTDM_TX_MAX 256 /* in bytes, valid for <= 1p3 */ -#define UARTDM_RX_SIZE (UART_XMIT_SIZE / 4) +#include <linux/wait.h> + +#define UART_MR1 0x0000 + +#define UART_MR1_AUTO_RFR_LEVEL0 0x3F +#define UART_MR1_AUTO_RFR_LEVEL1 0x3FF00 +#define UART_DM_MR1_AUTO_RFR_LEVEL1 0xFFFFFF00 +#define UART_MR1_RX_RDY_CTL BIT(7) +#define UART_MR1_CTS_CTL BIT(6) + +#define UART_MR2 0x0004 +#define UART_MR2_ERROR_MODE BIT(6) +#define UART_MR2_BITS_PER_CHAR 0x30 +#define UART_MR2_BITS_PER_CHAR_5 (0x0 << 4) +#define UART_MR2_BITS_PER_CHAR_6 (0x1 << 4) +#define UART_MR2_BITS_PER_CHAR_7 (0x2 << 4) +#define UART_MR2_BITS_PER_CHAR_8 (0x3 << 4) +#define UART_MR2_STOP_BIT_LEN_ONE (0x1 << 2) +#define UART_MR2_STOP_BIT_LEN_TWO (0x3 << 2) +#define UART_MR2_PARITY_MODE_NONE 0x0 +#define UART_MR2_PARITY_MODE_ODD 0x1 +#define UART_MR2_PARITY_MODE_EVEN 0x2 +#define UART_MR2_PARITY_MODE_SPACE 0x3 +#define UART_MR2_PARITY_MODE 0x3 + +#define UART_CSR 0x0008 + +#define UART_TF 0x000C +#define UARTDM_TF 0x0070 + +#define UART_CR 0x0010 +#define UART_CR_CMD_NULL (0 << 4) +#define UART_CR_CMD_RESET_RX (1 << 4) +#define UART_CR_CMD_RESET_TX (2 << 4) +#define UART_CR_CMD_RESET_ERR (3 << 4) +#define UART_CR_CMD_RESET_BREAK_INT (4 << 4) +#define UART_CR_CMD_START_BREAK (5 << 4) +#define UART_CR_CMD_STOP_BREAK (6 << 4) +#define UART_CR_CMD_RESET_CTS (7 << 4) +#define UART_CR_CMD_RESET_STALE_INT (8 << 4) +#define UART_CR_CMD_PACKET_MODE (9 << 4) +#define UART_CR_CMD_MODE_RESET (12 << 4) +#define UART_CR_CMD_SET_RFR (13 << 4) +#define UART_CR_CMD_RESET_RFR (14 << 4) +#define UART_CR_CMD_PROTECTION_EN (16 << 4) +#define UART_CR_CMD_STALE_EVENT_DISABLE (6 << 8) +#define UART_CR_CMD_STALE_EVENT_ENABLE (80 << 4) +#define UART_CR_CMD_FORCE_STALE (4 << 8) +#define UART_CR_CMD_RESET_TX_READY (3 << 8) +#define UART_CR_TX_DISABLE BIT(3) +#define UART_CR_TX_ENABLE BIT(2) +#define UART_CR_RX_DISABLE BIT(1) +#define UART_CR_RX_ENABLE BIT(0) +#define UART_CR_CMD_RESET_RXBREAK_START ((1 << 11) | (2 << 4)) + +#define UART_IMR 0x0014 +#define UART_IMR_TXLEV BIT(0) +#define UART_IMR_RXSTALE BIT(3) +#define UART_IMR_RXLEV BIT(4) +#define UART_IMR_DELTA_CTS BIT(5) +#define UART_IMR_CURRENT_CTS BIT(6) +#define UART_IMR_RXBREAK_START BIT(10) + +#define UART_IPR_RXSTALE_LAST 0x20 +#define UART_IPR_STALE_LSB 0x1F +#define UART_IPR_STALE_TIMEOUT_MSB 0x3FF80 +#define UART_DM_IPR_STALE_TIMEOUT_MSB 0xFFFFFF80 + +#define UART_IPR 0x0018 +#define UART_TFWR 0x001C +#define UART_RFWR 0x0020 +#define UART_HCR 0x0024 + +#define UART_MREG 0x0028 +#define UART_NREG 0x002C +#define UART_DREG 0x0030 +#define UART_MNDREG 0x0034 +#define UART_IRDA 0x0038 +#define UART_MISR_MODE 0x0040 +#define UART_MISR_RESET 0x0044 +#define UART_MISR_EXPORT 0x0048 +#define UART_MISR_VAL 0x004C +#define UART_TEST_CTRL 0x0050 + +#define UART_SR 0x0008 +#define UART_SR_HUNT_CHAR BIT(7) +#define UART_SR_RX_BREAK BIT(6) +#define UART_SR_PAR_FRAME_ERR BIT(5) +#define UART_SR_OVERRUN BIT(4) +#define UART_SR_TX_EMPTY BIT(3) +#define UART_SR_TX_READY BIT(2) +#define UART_SR_RX_FULL BIT(1) +#define UART_SR_RX_READY BIT(0) + +#define UART_RF 0x000C +#define UARTDM_RF 0x0070 +#define UART_MISR 0x0010 +#define UART_ISR 0x0014 +#define UART_ISR_TX_READY BIT(7) + +#define UARTDM_RXFS 0x50 +#define UARTDM_RXFS_BUF_SHIFT 0x7 +#define UARTDM_RXFS_BUF_MASK 0x7 + +#define UARTDM_DMEN 0x3C +#define UARTDM_DMEN_RX_SC_ENABLE BIT(5) +#define UARTDM_DMEN_TX_SC_ENABLE BIT(4) + +#define UARTDM_DMEN_TX_BAM_ENABLE BIT(2) /* UARTDM_1P4 */ +#define UARTDM_DMEN_TX_DM_ENABLE BIT(0) /* < UARTDM_1P4 */ + +#define UARTDM_DMEN_RX_BAM_ENABLE BIT(3) /* UARTDM_1P4 */ +#define UARTDM_DMEN_RX_DM_ENABLE BIT(1) /* < UARTDM_1P4 */ + +#define UARTDM_DMRX 0x34 +#define UARTDM_NCF_TX 0x40 +#define UARTDM_RX_TOTAL_SNAP 0x38 + +#define UARTDM_BURST_SIZE 16 /* in bytes */ +#define UARTDM_TX_AIGN(x) ((x) & ~0x3) /* valid for > 1p3 */ +#define UARTDM_TX_MAX 256 /* in bytes, valid for <= 1p3 */ +#define UARTDM_RX_SIZE (UART_XMIT_SIZE / 4) enum { UARTDM_1P1 = 1, @@ -78,10 +192,65 @@ struct msm_port { struct msm_dma rx_dma; }; +#define UART_TO_MSM(uart_port) container_of(uart_port, struct msm_port, uart) + +static +void msm_write(struct uart_port *port, unsigned int val, unsigned int off) +{ + writel_relaxed(val, port->membase + off); +} + +static +unsigned int msm_read(struct uart_port *port, unsigned int off) +{ + return readl_relaxed(port->membase + off); +} + +/* + * Setup the MND registers to use the TCXO clock. + */ +static void msm_serial_set_mnd_regs_tcxo(struct uart_port *port) +{ + msm_write(port, 0x06, UART_MREG); + msm_write(port, 0xF1, UART_NREG); + msm_write(port, 0x0F, UART_DREG); + msm_write(port, 0x1A, UART_MNDREG); + port->uartclk = 1843200; +} + +/* + * Setup the MND registers to use the TCXO clock divided by 4. + */ +static void msm_serial_set_mnd_regs_tcxoby4(struct uart_port *port) +{ + msm_write(port, 0x18, UART_MREG); + msm_write(port, 0xF6, UART_NREG); + msm_write(port, 0x0F, UART_DREG); + msm_write(port, 0x0A, UART_MNDREG); + port->uartclk = 1843200; +} + +static void msm_serial_set_mnd_regs(struct uart_port *port) +{ + struct msm_port *msm_port = UART_TO_MSM(port); + + /* + * These registers don't exist so we change the clk input rate + * on uartdm hardware instead + */ + if (msm_port->is_uartdm) + return; + + if (port->uartclk == 19200000) + msm_serial_set_mnd_regs_tcxo(port); + else if (port->uartclk == 4800000) + msm_serial_set_mnd_regs_tcxoby4(port); +} + static void msm_handle_tx(struct uart_port *port); static void msm_start_rx_dma(struct msm_port *msm_port); -void msm_stop_dma(struct uart_port *port, struct msm_dma *dma) +static void msm_stop_dma(struct uart_port *port, struct msm_dma *dma) { struct device *dev = port->dev; unsigned int mapped; @@ -388,10 +557,6 @@ static void msm_complete_rx_dma(void *args) val &= ~dma->enable_bit; msm_write(port, val, UARTDM_DMEN); - /* Restore interrupts */ - msm_port->imr |= UART_IMR_RXLEV | UART_IMR_RXSTALE; - msm_write(port, msm_port->imr, UART_IMR); - if (msm_read(port, UART_SR) & UART_SR_OVERRUN) { port->icount.overrun++; tty_insert_flip_char(tport, 0, TTY_OVERRUN); diff --git a/drivers/tty/serial/pic32_uart.c b/drivers/tty/serial/pic32_uart.c index 62a43bf56..7f8e99bbc 100644 --- a/drivers/tty/serial/pic32_uart.c +++ b/drivers/tty/serial/pic32_uart.c @@ -445,7 +445,6 @@ static int pic32_uart_startup(struct uart_port *port) sport->idx); if (!sport->irq_rx_name) { dev_err(port->dev, "%s: kasprintf err!", __func__); - kfree(sport->irq_fault_name); ret = -ENOMEM; goto out_f; } diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c index e156e39d6..b24b0556f 100644 --- a/drivers/tty/serial/pmac_zilog.c +++ b/drivers/tty/serial/pmac_zilog.c @@ -1720,7 +1720,7 @@ static int __init pmz_init_port(struct uart_pmac_port *uap) r_ports = platform_get_resource(uap->pdev, IORESOURCE_MEM, 0); irq = platform_get_irq(uap->pdev, 0); - if (!r_ports || !irq) + if (!r_ports || irq <= 0) return -ENODEV; uap->port.mapbase = r_ports->start; diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c index 41eab75ba..cd9d9e878 100644 --- a/drivers/tty/serial/pxa.c +++ b/drivers/tty/serial/pxa.c @@ -27,7 +27,6 @@ #define SUPPORT_SYSRQ #endif -#include <linux/module.h> #include <linux/ioport.h> #include <linux/init.h> #include <linux/console.h> @@ -829,7 +828,6 @@ static const struct of_device_id serial_pxa_dt_ids[] = { { .compatible = "mrvl,mmp-uart", }, {} }; -MODULE_DEVICE_TABLE(of, serial_pxa_dt_ids); static int serial_pxa_probe_dt(struct platform_device *pdev, struct uart_pxa_port *sport) @@ -914,28 +912,15 @@ static int serial_pxa_probe(struct platform_device *dev) return ret; } -static int serial_pxa_remove(struct platform_device *dev) -{ - struct uart_pxa_port *sport = platform_get_drvdata(dev); - - uart_remove_one_port(&serial_pxa_reg, &sport->port); - - clk_unprepare(sport->clk); - clk_put(sport->clk); - kfree(sport); - - return 0; -} - static struct platform_driver serial_pxa_driver = { .probe = serial_pxa_probe, - .remove = serial_pxa_remove, .driver = { .name = "pxa2xx-uart", #ifdef CONFIG_PM .pm = &serial_pxa_pm_ops, #endif + .suppress_bind_attrs = true, .of_match_table = serial_pxa_dt_ids, }, }; @@ -954,15 +939,4 @@ static int __init serial_pxa_init(void) return ret; } - -static void __exit serial_pxa_exit(void) -{ - platform_driver_unregister(&serial_pxa_driver); - uart_unregister_driver(&serial_pxa_reg); -} - -module_init(serial_pxa_init); -module_exit(serial_pxa_exit); - -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:pxa2xx-uart"); +device_initcall(serial_pxa_init); diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index f0bd2ec0d..ae2095a66 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -169,8 +169,7 @@ static void s3c24xx_serial_stop_tx(struct uart_port *port) return; if (s3c24xx_serial_has_interrupt_mask(port)) - __set_bit(S3C64XX_UINTM_TXD, - portaddrl(port, S3C64XX_UINTM)); + s3c24xx_set_bit(port, S3C64XX_UINTM_TXD, S3C64XX_UINTM); else disable_irq_nosync(ourport->tx_irq); @@ -235,8 +234,7 @@ static void enable_tx_dma(struct s3c24xx_uart_port *ourport) /* Mask Tx interrupt */ if (s3c24xx_serial_has_interrupt_mask(port)) - __set_bit(S3C64XX_UINTM_TXD, - portaddrl(port, S3C64XX_UINTM)); + s3c24xx_set_bit(port, S3C64XX_UINTM_TXD, S3C64XX_UINTM); else disable_irq_nosync(ourport->tx_irq); @@ -269,8 +267,8 @@ static void enable_tx_pio(struct s3c24xx_uart_port *ourport) /* Unmask Tx interrupt */ if (s3c24xx_serial_has_interrupt_mask(port)) - __clear_bit(S3C64XX_UINTM_TXD, - portaddrl(port, S3C64XX_UINTM)); + s3c24xx_clear_bit(port, S3C64XX_UINTM_TXD, + S3C64XX_UINTM); else enable_irq(ourport->tx_irq); @@ -397,8 +395,8 @@ static void s3c24xx_serial_stop_rx(struct uart_port *port) if (rx_enabled(port)) { dbg("s3c24xx_serial_stop_rx: port=%p\n", port); if (s3c24xx_serial_has_interrupt_mask(port)) - __set_bit(S3C64XX_UINTM_RXD, - portaddrl(port, S3C64XX_UINTM)); + s3c24xx_set_bit(port, S3C64XX_UINTM_RXD, + S3C64XX_UINTM); else disable_irq_nosync(ourport->rx_irq); rx_enabled(port) = 0; @@ -1069,7 +1067,7 @@ static int s3c64xx_serial_startup(struct uart_port *port) spin_unlock_irqrestore(&port->lock, flags); /* Enable Rx Interrupt */ - __clear_bit(S3C64XX_UINTM_RXD, portaddrl(port, S3C64XX_UINTM)); + s3c24xx_clear_bit(port, S3C64XX_UINTM_RXD, S3C64XX_UINTM); dbg("s3c64xx_serial_startup ok\n"); return ret; @@ -1844,8 +1842,6 @@ static int s3c24xx_serial_probe(struct platform_device *pdev) ourport->min_dma_size = max_t(int, ourport->port.fifosize, dma_get_cache_alignment()); - probe_index++; - dbg("%s: initialising port %p...\n", __func__, ourport); ret = s3c24xx_serial_init_port(ourport, pdev); @@ -1875,6 +1871,8 @@ static int s3c24xx_serial_probe(struct platform_device *pdev) if (ret < 0) dev_err(&pdev->dev, "failed to add cpufreq notifier\n"); + probe_index++; + return 0; } diff --git a/drivers/tty/serial/samsung.h b/drivers/tty/serial/samsung.h index fc5deaa4f..2ae4fcee1 100644 --- a/drivers/tty/serial/samsung.h +++ b/drivers/tty/serial/samsung.h @@ -117,10 +117,38 @@ struct s3c24xx_uart_port { #define portaddrl(port, reg) \ ((unsigned long *)(unsigned long)((port)->membase + (reg))) -#define rd_regb(port, reg) (__raw_readb(portaddr(port, reg))) -#define rd_regl(port, reg) (__raw_readl(portaddr(port, reg))) - -#define wr_regb(port, reg, val) __raw_writeb(val, portaddr(port, reg)) -#define wr_regl(port, reg, val) __raw_writel(val, portaddr(port, reg)) +#define rd_regb(port, reg) (readb_relaxed(portaddr(port, reg))) +#define rd_regl(port, reg) (readl_relaxed(portaddr(port, reg))) + +#define wr_regb(port, reg, val) writeb_relaxed(val, portaddr(port, reg)) +#define wr_regl(port, reg, val) writel_relaxed(val, portaddr(port, reg)) + +/* Byte-order aware bit setting/clearing functions. */ + +static inline void s3c24xx_set_bit(struct uart_port *port, int idx, + unsigned int reg) +{ + unsigned long flags; + u32 val; + + local_irq_save(flags); + val = rd_regl(port, reg); + val |= (1 << idx); + wr_regl(port, reg, val); + local_irq_restore(flags); +} + +static inline void s3c24xx_clear_bit(struct uart_port *port, int idx, + unsigned int reg) +{ + unsigned long flags; + u32 val; + + local_irq_save(flags); + val = rd_regl(port, reg); + val &= ~(1 << idx); + wr_regl(port, reg, val); + local_irq_restore(flags); +} #endif diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c index 1dba6719d..731ac35ac 100644 --- a/drivers/tty/serial/serial-tegra.c +++ b/drivers/tty/serial/serial-tegra.c @@ -1317,7 +1317,12 @@ static int tegra_uart_probe(struct platform_device *pdev) } u->iotype = UPIO_MEM32; - u->irq = platform_get_irq(pdev, 0); + ret = platform_get_irq(pdev, 0); + if (ret < 0) { + dev_err(&pdev->dev, "Couldn't get IRQ\n"); + return ret; + } + u->irq = ret; u->regshift = 2; ret = uart_add_one_port(&tegra_uart_driver, u); if (ret < 0) { diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index a333c59cb..9fc15335c 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -887,7 +887,7 @@ static int uart_set_info(struct tty_struct *tty, struct tty_port *port, /* * Free and release old regions */ - if (old_type != PORT_UNKNOWN) + if (old_type != PORT_UNKNOWN && uport->ops->release_port) uport->ops->release_port(uport); uport->iobase = new_port; @@ -900,7 +900,7 @@ static int uart_set_info(struct tty_struct *tty, struct tty_port *port, /* * Claim and map the new regions */ - if (uport->type != PORT_UNKNOWN) { + if (uport->type != PORT_UNKNOWN && uport->ops->request_port) { retval = uport->ops->request_port(uport); } else { /* Always success - Jean II */ @@ -1125,7 +1125,7 @@ static int uart_do_autoconfig(struct tty_struct *tty,struct uart_state *state) * If we already have a port type configured, * we must release its resources. */ - if (uport->type != PORT_UNKNOWN) + if (uport->type != PORT_UNKNOWN && uport->ops->release_port) uport->ops->release_port(uport); flags = UART_CONFIG_TYPE; @@ -2897,7 +2897,7 @@ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport) /* * Free the port IO and memory resources, if any. */ - if (uport->type != PORT_UNKNOWN) + if (uport->type != PORT_UNKNOWN && uport->ops->release_port) uport->ops->release_port(uport); kfree(uport->tty_groups); diff --git a/drivers/tty/serial/serial_mctrl_gpio.c b/drivers/tty/serial/serial_mctrl_gpio.c index e8dd5097d..d2da6aa7f 100644 --- a/drivers/tty/serial/serial_mctrl_gpio.c +++ b/drivers/tty/serial/serial_mctrl_gpio.c @@ -52,6 +52,9 @@ void mctrl_gpio_set(struct mctrl_gpios *gpios, unsigned int mctrl) int value_array[UART_GPIO_MAX]; unsigned int count = 0; + if (gpios == NULL) + return; + for (i = 0; i < UART_GPIO_MAX; i++) if (gpios->gpio[i] && mctrl_gpios_desc[i].dir_out) { desc_array[count] = gpios->gpio[i]; @@ -73,6 +76,9 @@ unsigned int mctrl_gpio_get(struct mctrl_gpios *gpios, unsigned int *mctrl) { enum mctrl_gpio_idx i; + if (gpios == NULL) + return *mctrl; + for (i = 0; i < UART_GPIO_MAX; i++) { if (gpios->gpio[i] && !mctrl_gpios_desc[i].dir_out) { if (gpiod_get_value(gpios->gpio[i])) @@ -86,6 +92,27 @@ unsigned int mctrl_gpio_get(struct mctrl_gpios *gpios, unsigned int *mctrl) } EXPORT_SYMBOL_GPL(mctrl_gpio_get); +unsigned int +mctrl_gpio_get_outputs(struct mctrl_gpios *gpios, unsigned int *mctrl) +{ + enum mctrl_gpio_idx i; + + if (gpios == NULL) + return *mctrl; + + for (i = 0; i < UART_GPIO_MAX; i++) { + if (gpios->gpio[i] && mctrl_gpios_desc[i].dir_out) { + if (gpiod_get_value(gpios->gpio[i])) + *mctrl |= mctrl_gpios_desc[i].mctrl; + else + *mctrl &= ~mctrl_gpios_desc[i].mctrl; + } + } + + return *mctrl; +} +EXPORT_SYMBOL_GPL(mctrl_gpio_get_outputs); + struct mctrl_gpios *mctrl_gpio_init_noauto(struct device *dev, unsigned int idx) { struct mctrl_gpios *gpios; @@ -203,6 +230,9 @@ void mctrl_gpio_free(struct device *dev, struct mctrl_gpios *gpios) { enum mctrl_gpio_idx i; + if (gpios == NULL) + return; + for (i = 0; i < UART_GPIO_MAX; i++) { if (gpios->irq[i]) devm_free_irq(gpios->port->dev, gpios->irq[i], gpios); @@ -218,6 +248,9 @@ void mctrl_gpio_enable_ms(struct mctrl_gpios *gpios) { enum mctrl_gpio_idx i; + if (gpios == NULL) + return; + /* .enable_ms may be called multiple times */ if (gpios->mctrl_on) return; @@ -240,6 +273,9 @@ void mctrl_gpio_disable_ms(struct mctrl_gpios *gpios) { enum mctrl_gpio_idx i; + if (gpios == NULL) + return; + if (!gpios->mctrl_on) return; diff --git a/drivers/tty/serial/serial_mctrl_gpio.h b/drivers/tty/serial/serial_mctrl_gpio.h index 332a33ab0..fa000bcff 100644 --- a/drivers/tty/serial/serial_mctrl_gpio.h +++ b/drivers/tty/serial/serial_mctrl_gpio.h @@ -48,12 +48,19 @@ struct mctrl_gpios; void mctrl_gpio_set(struct mctrl_gpios *gpios, unsigned int mctrl); /* - * Get state of the modem control output lines from GPIOs. + * Get state of the modem control input lines from GPIOs. * The mctrl flags are updated and returned. */ unsigned int mctrl_gpio_get(struct mctrl_gpios *gpios, unsigned int *mctrl); /* + * Get state of the modem control output lines from GPIOs. + * The mctrl flags are updated and returned. + */ +unsigned int +mctrl_gpio_get_outputs(struct mctrl_gpios *gpios, unsigned int *mctrl); + +/* * Returns the associated struct gpio_desc to the modem line gidx */ struct gpio_desc *mctrl_gpio_to_gpiod(struct mctrl_gpios *gpios, @@ -107,6 +114,12 @@ unsigned int mctrl_gpio_get(struct mctrl_gpios *gpios, unsigned int *mctrl) return *mctrl; } +static inline unsigned int +mctrl_gpio_get_outputs(struct mctrl_gpios *gpios, unsigned int *mctrl) +{ + return *mctrl; +} + static inline struct gpio_desc *mctrl_gpio_to_gpiod(struct mctrl_gpios *gpios, enum mctrl_gpio_idx gidx) diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 0130feb06..d86eee38a 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -57,6 +57,7 @@ #include <asm/sh_bios.h> #endif +#include "serial_mctrl_gpio.h" #include "sh-sci.h" /* Offsets into the sci_port->irqs array */ @@ -111,6 +112,7 @@ struct sci_port { unsigned int error_clear; unsigned int sampling_rate_mask; resource_size_t reg_size; + struct mctrl_gpios *gpios; /* Break timer */ struct timer_list break_timer; @@ -139,6 +141,8 @@ struct sci_port { struct timer_list rx_timer; unsigned int rx_timeout; #endif + + bool autorts; }; #define SCI_NPORTS CONFIG_SERIAL_SH_SCI_NR_UARTS @@ -701,7 +705,6 @@ static void sci_poll_put_char(struct uart_port *port, unsigned char c) static void sci_init_pins(struct uart_port *port, unsigned int cflag) { struct sci_port *s = to_sci_port(port); - const struct plat_sci_reg *reg = sci_regmap[s->cfg->regtype] + SCSPTR; /* * Use port-specific handler if provided. @@ -711,21 +714,28 @@ static void sci_init_pins(struct uart_port *port, unsigned int cflag) return; } - /* - * For the generic path SCSPTR is necessary. Bail out if that's - * unavailable, too. - */ - if (!reg->size) - return; - - if ((s->cfg->capabilities & SCIx_HAVE_RTSCTS) && - ((!(cflag & CRTSCTS)))) { - unsigned short status; + if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) { + u16 ctrl = serial_port_in(port, SCPCR); + + /* Enable RXD and TXD pin functions */ + ctrl &= ~(SCPCR_RXDC | SCPCR_TXDC); + if (to_sci_port(port)->cfg->capabilities & SCIx_HAVE_RTSCTS) { + /* RTS# is output, driven 1 */ + ctrl |= SCPCR_RTSC; + serial_port_out(port, SCPDR, + serial_port_in(port, SCPDR) | SCPDR_RTSD); + /* Enable CTS# pin function */ + ctrl &= ~SCPCR_CTSC; + } + serial_port_out(port, SCPCR, ctrl); + } else if (sci_getreg(port, SCSPTR)->size) { + u16 status = serial_port_in(port, SCSPTR); - status = serial_port_in(port, SCSPTR); - status &= ~SCSPTR_CTSIO; - status |= SCSPTR_RTSIO; - serial_port_out(port, SCSPTR, status); /* Set RTS = 1 */ + /* RTS# is output, driven 1 */ + status |= SCSPTR_RTSIO | SCSPTR_RTSDT; + /* CTS# and SCK are inputs */ + status &= ~(SCSPTR_CTSIO | SCSPTR_SCKIO); + serial_port_out(port, SCSPTR, status); } } @@ -1803,6 +1813,46 @@ static unsigned int sci_tx_empty(struct uart_port *port) return (status & SCxSR_TEND(port)) && !in_tx_fifo ? TIOCSER_TEMT : 0; } +static void sci_set_rts(struct uart_port *port, bool state) +{ + if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) { + u16 data = serial_port_in(port, SCPDR); + + /* Active low */ + if (state) + data &= ~SCPDR_RTSD; + else + data |= SCPDR_RTSD; + serial_port_out(port, SCPDR, data); + + /* RTS# is output */ + serial_port_out(port, SCPCR, + serial_port_in(port, SCPCR) | SCPCR_RTSC); + } else if (sci_getreg(port, SCSPTR)->size) { + u16 ctrl = serial_port_in(port, SCSPTR); + + /* Active low */ + if (state) + ctrl &= ~SCSPTR_RTSDT; + else + ctrl |= SCSPTR_RTSDT; + serial_port_out(port, SCSPTR, ctrl); + } +} + +static bool sci_get_cts(struct uart_port *port) +{ + if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) { + /* Active low */ + return !(serial_port_in(port, SCPDR) & SCPDR_CTSD); + } else if (sci_getreg(port, SCSPTR)->size) { + /* Active low */ + return !(serial_port_in(port, SCSPTR) & SCSPTR_CTSDT); + } + + return true; +} + /* * Modem control is a bit of a mixed bag for SCI(F) ports. Generally * CTS/RTS is supported in hardware by at least one port and controlled @@ -1817,6 +1867,8 @@ static unsigned int sci_tx_empty(struct uart_port *port) */ static void sci_set_mctrl(struct uart_port *port, unsigned int mctrl) { + struct sci_port *s = to_sci_port(port); + if (mctrl & TIOCM_LOOP) { const struct plat_sci_reg *reg; @@ -1829,25 +1881,72 @@ static void sci_set_mctrl(struct uart_port *port, unsigned int mctrl) serial_port_in(port, SCFCR) | SCFCR_LOOP); } + + mctrl_gpio_set(s->gpios, mctrl); + + if (!(s->cfg->capabilities & SCIx_HAVE_RTSCTS)) + return; + + if (!(mctrl & TIOCM_RTS)) { + /* Disable Auto RTS */ + serial_port_out(port, SCFCR, + serial_port_in(port, SCFCR) & ~SCFCR_MCE); + + /* Clear RTS */ + sci_set_rts(port, 0); + } else if (s->autorts) { + if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) { + /* Enable RTS# pin function */ + serial_port_out(port, SCPCR, + serial_port_in(port, SCPCR) & ~SCPCR_RTSC); + } + + /* Enable Auto RTS */ + serial_port_out(port, SCFCR, + serial_port_in(port, SCFCR) | SCFCR_MCE); + } else { + /* Set RTS */ + sci_set_rts(port, 1); + } } static unsigned int sci_get_mctrl(struct uart_port *port) { + struct sci_port *s = to_sci_port(port); + struct mctrl_gpios *gpios = s->gpios; + unsigned int mctrl = 0; + + mctrl_gpio_get(gpios, &mctrl); + /* * CTS/RTS is handled in hardware when supported, while nothing - * else is wired up. Keep it simple and simply assert DSR/CAR. + * else is wired up. */ - return TIOCM_DSR | TIOCM_CAR; + if (s->autorts) { + if (sci_get_cts(port)) + mctrl |= TIOCM_CTS; + } else if (IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(gpios, UART_GPIO_CTS))) { + mctrl |= TIOCM_CTS; + } + if (IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(gpios, UART_GPIO_DSR))) + mctrl |= TIOCM_DSR; + if (IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(gpios, UART_GPIO_DCD))) + mctrl |= TIOCM_CAR; + + return mctrl; +} + +static void sci_enable_ms(struct uart_port *port) +{ + mctrl_gpio_enable_ms(to_sci_port(port)->gpios); } static void sci_break_ctl(struct uart_port *port, int break_state) { - struct sci_port *s = to_sci_port(port); - const struct plat_sci_reg *reg = sci_regmap[s->cfg->regtype] + SCSPTR; unsigned short scscr, scsptr; /* check wheter the port has SCSPTR */ - if (!reg->size) { + if (!sci_getreg(port, SCSPTR)->size) { /* * Not supported by hardware. Most parts couple break and rx * interrupts together, with break detection always enabled. @@ -1873,7 +1972,6 @@ static void sci_break_ctl(struct uart_port *port, int break_state) static int sci_startup(struct uart_port *port) { struct sci_port *s = to_sci_port(port); - unsigned long flags; int ret; dev_dbg(port->dev, "%s(%d)\n", __func__, port->line); @@ -1884,11 +1982,6 @@ static int sci_startup(struct uart_port *port) sci_request_dma(port); - spin_lock_irqsave(&port->lock, flags); - sci_start_tx(port); - sci_start_rx(port); - spin_unlock_irqrestore(&port->lock, flags); - return 0; } @@ -1896,12 +1989,19 @@ static void sci_shutdown(struct uart_port *port) { struct sci_port *s = to_sci_port(port); unsigned long flags; + u16 scr; dev_dbg(port->dev, "%s(%d)\n", __func__, port->line); + s->autorts = false; + mctrl_gpio_disable_ms(to_sci_port(port)->gpios); + spin_lock_irqsave(&port->lock, flags); sci_stop_rx(port); sci_stop_tx(port); + /* Stop RX and TX, disable related interrupts, keep clock source */ + scr = serial_port_in(port, SCSCR); + serial_port_out(port, SCSCR, scr & (SCSCR_CKE1 | SCSCR_CKE0)); spin_unlock_irqrestore(&port->lock, flags); #ifdef CONFIG_SERIAL_SH_SCI_DMA @@ -2056,6 +2156,15 @@ static void sci_reset(struct uart_port *port) reg = sci_getreg(port, SCFCR); if (reg->size) serial_port_out(port, SCFCR, SCFCR_RFRST | SCFCR_TFRST); + + sci_clear_SCxSR(port, + SCxSR_RDxF_CLEAR(port) & SCxSR_ERROR_CLEAR(port) & + SCxSR_BREAK_CLEAR(port)); + if (sci_getreg(port, SCLSR)->size) { + status = serial_port_in(port, SCLSR); + status &= ~(SCLSR_TO | SCLSR_ORER); + serial_port_out(port, SCLSR, status); + } } static void sci_set_termios(struct uart_port *port, struct ktermios *termios, @@ -2218,15 +2327,18 @@ done: sci_init_pins(port, termios->c_cflag); + port->status &= ~UPSTAT_AUTOCTS; + s->autorts = false; reg = sci_getreg(port, SCFCR); if (reg->size) { unsigned short ctrl = serial_port_in(port, SCFCR); - if (s->cfg->capabilities & SCIx_HAVE_RTSCTS) { - if (termios->c_cflag & CRTSCTS) - ctrl |= SCFCR_MCE; - else - ctrl &= ~SCFCR_MCE; + if ((port->flags & UPF_HARD_FLOW) && + (termios->c_cflag & CRTSCTS)) { + /* There is no CTS interrupt to restart the hardware */ + port->status |= UPSTAT_AUTOCTS; + /* MCE is enabled when RTS is raised */ + s->autorts = true; } /* @@ -2300,6 +2412,9 @@ done: sci_start_rx(port); sci_port_disable(s); + + if (UART_ENABLE_MS(port, termios->c_cflag)) + sci_enable_ms(port); } static void sci_pm(struct uart_port *port, unsigned int state, @@ -2425,6 +2540,7 @@ static struct uart_ops sci_uart_ops = { .start_tx = sci_start_tx, .stop_tx = sci_stop_tx, .stop_rx = sci_stop_rx, + .enable_ms = sci_enable_ms, .break_ctl = sci_break_ctl, .startup = sci_startup, .shutdown = sci_shutdown, @@ -2890,6 +3006,9 @@ sci_parse_dt(struct platform_device *pdev, unsigned int *dev_id) p->regtype = SCI_OF_REGTYPE(match->data); p->scscr = SCSCR_RE | SCSCR_TE; + if (of_find_property(np, "uart-has-rtscts", NULL)) + p->capabilities |= SCIx_HAVE_RTSCTS; + return p; } @@ -2912,6 +3031,21 @@ static int sci_probe_single(struct platform_device *dev, if (ret) return ret; + sciport->gpios = mctrl_gpio_init(&sciport->port, 0); + if (IS_ERR(sciport->gpios) && PTR_ERR(sciport->gpios) != -ENOSYS) + return PTR_ERR(sciport->gpios); + + if (p->capabilities & SCIx_HAVE_RTSCTS) { + if (!IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(sciport->gpios, + UART_GPIO_CTS)) || + !IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(sciport->gpios, + UART_GPIO_RTS))) { + dev_err(&dev->dev, "Conflicting RTS/CTS config\n"); + return -EINVAL; + } + sciport->port.flags |= UPF_HARD_FLOW; + } + ret = uart_add_one_port(&sci_uart_driver, &sciport->port); if (ret) { sci_cleanup_single(sciport); diff --git a/drivers/tty/serial/sh-sci.h b/drivers/tty/serial/sh-sci.h index 7a4fa185b..ffa6d688c 100644 --- a/drivers/tty/serial/sh-sci.h +++ b/drivers/tty/serial/sh-sci.h @@ -105,13 +105,16 @@ enum { #define SCFCR_LOOP BIT(0) /* Loopback Test */ /* SCLSR (Line Status Register) on (H)SCIF */ +#define SCLSR_TO BIT(2) /* Timeout */ #define SCLSR_ORER BIT(0) /* Overrun Error */ /* SCSPTR (Serial Port Register), optional */ -#define SCSPTR_RTSIO BIT(7) /* Serial Port RTS Pin Input/Output */ -#define SCSPTR_RTSDT BIT(6) /* Serial Port RTS Pin Data */ -#define SCSPTR_CTSIO BIT(5) /* Serial Port CTS Pin Input/Output */ -#define SCSPTR_CTSDT BIT(4) /* Serial Port CTS Pin Data */ +#define SCSPTR_RTSIO BIT(7) /* Serial Port RTS# Pin Input/Output */ +#define SCSPTR_RTSDT BIT(6) /* Serial Port RTS# Pin Data */ +#define SCSPTR_CTSIO BIT(5) /* Serial Port CTS# Pin Input/Output */ +#define SCSPTR_CTSDT BIT(4) /* Serial Port CTS# Pin Data */ +#define SCSPTR_SCKIO BIT(3) /* Serial Port Clock Pin Input/Output */ +#define SCSPTR_SCKDT BIT(2) /* Serial Port Clock Pin Data */ #define SCSPTR_SPB2IO BIT(1) /* Serial Port Break Input/Output */ #define SCSPTR_SPB2DT BIT(0) /* Serial Port Break Data */ @@ -119,12 +122,18 @@ enum { #define HSCIF_SRE BIT(15) /* Sampling Rate Register Enable */ /* SCPCR (Serial Port Control Register), SCIFA/SCIFB only */ -#define SCPCR_RTSC BIT(4) /* Serial Port RTS Pin / Output Pin */ -#define SCPCR_CTSC BIT(3) /* Serial Port CTS Pin / Input Pin */ +#define SCPCR_RTSC BIT(4) /* Serial Port RTS# Pin / Output Pin */ +#define SCPCR_CTSC BIT(3) /* Serial Port CTS# Pin / Input Pin */ +#define SCPCR_SCKC BIT(2) /* Serial Port SCK Pin / Output Pin */ +#define SCPCR_RXDC BIT(1) /* Serial Port RXD Pin / Input Pin */ +#define SCPCR_TXDC BIT(0) /* Serial Port TXD Pin / Output Pin */ /* SCPDR (Serial Port Data Register), SCIFA/SCIFB only */ -#define SCPDR_RTSD BIT(4) /* Serial Port RTS Output Pin Data */ -#define SCPDR_CTSD BIT(3) /* Serial Port CTS Input Pin Data */ +#define SCPDR_RTSD BIT(4) /* Serial Port RTS# Output Pin Data */ +#define SCPDR_CTSD BIT(3) /* Serial Port CTS# Input Pin Data */ +#define SCPDR_SCKD BIT(2) /* Serial Port SCK Output Pin Data */ +#define SCPDR_RXDD BIT(1) /* Serial Port RXD Input Pin Data */ +#define SCPDR_TXDD BIT(0) /* Serial Port TXD Output Pin Data */ /* * BRG Clock Select Register (Some SCIF and HSCIF) diff --git a/drivers/tty/serial/sirfsoc_uart.h b/drivers/tty/serial/sirfsoc_uart.h index c3a885b4d..43756bd91 100644 --- a/drivers/tty/serial/sirfsoc_uart.h +++ b/drivers/tty/serial/sirfsoc_uart.h @@ -106,7 +106,7 @@ struct sirfsoc_uart_register { enum sirfsoc_uart_type uart_type; }; -u32 uart_usp_ff_full_mask(struct uart_port *port) +static u32 uart_usp_ff_full_mask(struct uart_port *port) { u32 full_bit; @@ -114,7 +114,7 @@ u32 uart_usp_ff_full_mask(struct uart_port *port) return (1 << full_bit); } -u32 uart_usp_ff_empty_mask(struct uart_port *port) +static u32 uart_usp_ff_empty_mask(struct uart_port *port) { u32 empty_bit; diff --git a/drivers/tty/serial/sunhv.c b/drivers/tty/serial/sunhv.c index ca0d3802f..4e603d060 100644 --- a/drivers/tty/serial/sunhv.c +++ b/drivers/tty/serial/sunhv.c @@ -490,12 +490,6 @@ static void sunhv_console_write_bychar(struct console *con, const char *s, unsig locked = spin_trylock_irqsave(&port->lock, flags); else spin_lock_irqsave(&port->lock, flags); - if (port->sysrq) { - locked = 0; - } else if (oops_in_progress) { - locked = spin_trylock(&port->lock); - } else - spin_lock(&port->lock); for (i = 0; i < n; i++) { if (*s == '\n') diff --git a/drivers/tty/serial/vt8500_serial.c b/drivers/tty/serial/vt8500_serial.c index b384060e3..23cfc5e16 100644 --- a/drivers/tty/serial/vt8500_serial.c +++ b/drivers/tty/serial/vt8500_serial.c @@ -21,7 +21,6 @@ #include <linux/hrtimer.h> #include <linux/delay.h> -#include <linux/module.h> #include <linux/io.h> #include <linux/ioport.h> #include <linux/irq.h> @@ -730,22 +729,12 @@ static int vt8500_serial_probe(struct platform_device *pdev) return 0; } -static int vt8500_serial_remove(struct platform_device *pdev) -{ - struct vt8500_port *vt8500_port = platform_get_drvdata(pdev); - - clk_disable_unprepare(vt8500_port->clk); - uart_remove_one_port(&vt8500_uart_driver, &vt8500_port->uart); - - return 0; -} - static struct platform_driver vt8500_platform_driver = { .probe = vt8500_serial_probe, - .remove = vt8500_serial_remove, .driver = { .name = "vt8500_serial", .of_match_table = wmt_dt_ids, + .suppress_bind_attrs = true, }, }; @@ -764,19 +753,4 @@ static int __init vt8500_serial_init(void) return ret; } - -static void __exit vt8500_serial_exit(void) -{ -#ifdef CONFIG_SERIAL_VT8500_CONSOLE - unregister_console(&vt8500_console); -#endif - platform_driver_unregister(&vt8500_platform_driver); - uart_unregister_driver(&vt8500_uart_driver); -} - -module_init(vt8500_serial_init); -module_exit(vt8500_serial_exit); - -MODULE_AUTHOR("Alexey Charkov <alchark@gmail.com>"); -MODULE_DESCRIPTION("Driver for vt8500 serial device"); -MODULE_LICENSE("GPL v2"); +device_initcall(vt8500_serial_init); diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index cd46e64c4..9ca1a4d1b 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -976,6 +976,23 @@ static void cdns_uart_poll_put_char(struct uart_port *port, unsigned char c) } #endif +static void cdns_uart_pm(struct uart_port *port, unsigned int state, + unsigned int oldstate) +{ + struct cdns_uart *cdns_uart = port->private_data; + + switch (state) { + case UART_PM_STATE_OFF: + clk_disable(cdns_uart->uartclk); + clk_disable(cdns_uart->pclk); + break; + default: + clk_enable(cdns_uart->pclk); + clk_enable(cdns_uart->uartclk); + break; + } +} + static struct uart_ops cdns_uart_ops = { .set_mctrl = cdns_uart_set_mctrl, .get_mctrl = cdns_uart_get_mctrl, @@ -987,6 +1004,7 @@ static struct uart_ops cdns_uart_ops = { .set_termios = cdns_uart_set_termios, .startup = cdns_uart_startup, .shutdown = cdns_uart_shutdown, + .pm = cdns_uart_pm, .type = cdns_uart_type, .verify_port = cdns_uart_verify_port, .request_port = cdns_uart_request_port, @@ -1350,12 +1368,12 @@ static int cdns_uart_probe(struct platform_device *pdev) return PTR_ERR(cdns_uart_data->uartclk); } - rc = clk_prepare_enable(cdns_uart_data->pclk); + rc = clk_prepare(cdns_uart_data->pclk); if (rc) { dev_err(&pdev->dev, "Unable to enable pclk clock.\n"); return rc; } - rc = clk_prepare_enable(cdns_uart_data->uartclk); + rc = clk_prepare(cdns_uart_data->uartclk); if (rc) { dev_err(&pdev->dev, "Unable to enable device clock.\n"); goto err_out_clk_dis_pclk; @@ -1422,9 +1440,9 @@ err_out_notif_unreg: &cdns_uart_data->clk_rate_change_nb); #endif err_out_clk_disable: - clk_disable_unprepare(cdns_uart_data->uartclk); + clk_unprepare(cdns_uart_data->uartclk); err_out_clk_dis_pclk: - clk_disable_unprepare(cdns_uart_data->pclk); + clk_unprepare(cdns_uart_data->pclk); return rc; } @@ -1448,8 +1466,8 @@ static int cdns_uart_remove(struct platform_device *pdev) #endif rc = uart_remove_one_port(&cdns_uart_uart_driver, port); port->mapbase = 0; - clk_disable_unprepare(cdns_uart_data->uartclk); - clk_disable_unprepare(cdns_uart_data->pclk); + clk_unprepare(cdns_uart_data->uartclk); + clk_unprepare(cdns_uart_data->pclk); return rc; } |