From e5fd91f1ef340da553f7a79da9540c3db711c937 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andr=C3=A9=20Fabian=20Silva=20Delgado?= Date: Tue, 8 Sep 2015 01:01:14 -0300 Subject: Linux-libre 4.2-gnu --- drivers/tty/serial/sh-sci.c | 136 +++++++++++++++++++++++--------------------- 1 file changed, 70 insertions(+), 66 deletions(-) (limited to 'drivers/tty/serial/sh-sci.c') diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index e7d6566fa..1b2f894bd 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -81,10 +81,11 @@ struct sci_port { /* Platform configuration */ struct plat_sci_port *cfg; - int overrun_bit; + unsigned int overrun_reg; + unsigned int overrun_mask; unsigned int error_mask; unsigned int sampling_rate; - + resource_size_t reg_size; /* Break timer */ struct timer_list break_timer; @@ -168,6 +169,8 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = { [SCSPTR] = sci_reg_invalid, [SCLSR] = sci_reg_invalid, [HSSRR] = sci_reg_invalid, + [SCPCR] = sci_reg_invalid, + [SCPDR] = sci_reg_invalid, }, /* @@ -188,6 +191,8 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = { [SCSPTR] = sci_reg_invalid, [SCLSR] = sci_reg_invalid, [HSSRR] = sci_reg_invalid, + [SCPCR] = sci_reg_invalid, + [SCPDR] = sci_reg_invalid, }, /* @@ -207,6 +212,8 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = { [SCSPTR] = sci_reg_invalid, [SCLSR] = sci_reg_invalid, [HSSRR] = sci_reg_invalid, + [SCPCR] = { 0x30, 16 }, + [SCPDR] = { 0x34, 16 }, }, /* @@ -226,6 +233,8 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = { [SCSPTR] = sci_reg_invalid, [SCLSR] = sci_reg_invalid, [HSSRR] = sci_reg_invalid, + [SCPCR] = { 0x30, 16 }, + [SCPDR] = { 0x34, 16 }, }, /* @@ -246,6 +255,8 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = { [SCSPTR] = { 0x20, 16 }, [SCLSR] = { 0x24, 16 }, [HSSRR] = sci_reg_invalid, + [SCPCR] = sci_reg_invalid, + [SCPDR] = sci_reg_invalid, }, /* @@ -265,6 +276,8 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = { [SCSPTR] = sci_reg_invalid, [SCLSR] = sci_reg_invalid, [HSSRR] = sci_reg_invalid, + [SCPCR] = sci_reg_invalid, + [SCPDR] = sci_reg_invalid, }, /* @@ -284,6 +297,8 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = { [SCSPTR] = { 0x20, 16 }, [SCLSR] = { 0x24, 16 }, [HSSRR] = sci_reg_invalid, + [SCPCR] = sci_reg_invalid, + [SCPDR] = sci_reg_invalid, }, /* @@ -303,6 +318,8 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = { [SCSPTR] = { 0x20, 16 }, [SCLSR] = { 0x24, 16 }, [HSSRR] = { 0x40, 16 }, + [SCPCR] = sci_reg_invalid, + [SCPDR] = sci_reg_invalid, }, /* @@ -323,6 +340,8 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = { [SCSPTR] = sci_reg_invalid, [SCLSR] = { 0x24, 16 }, [HSSRR] = sci_reg_invalid, + [SCPCR] = sci_reg_invalid, + [SCPDR] = sci_reg_invalid, }, /* @@ -343,6 +362,8 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = { [SCSPTR] = { 0x24, 16 }, [SCLSR] = { 0x28, 16 }, [HSSRR] = sci_reg_invalid, + [SCPCR] = sci_reg_invalid, + [SCPDR] = sci_reg_invalid, }, /* @@ -363,6 +384,8 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = { [SCSPTR] = sci_reg_invalid, [SCLSR] = sci_reg_invalid, [HSSRR] = sci_reg_invalid, + [SCPCR] = sci_reg_invalid, + [SCPDR] = sci_reg_invalid, }, }; @@ -781,7 +804,7 @@ static int sci_handle_errors(struct uart_port *port) struct sci_port *s = to_sci_port(port); /* Handle overruns */ - if (status & (1 << s->overrun_bit)) { + if (status & s->overrun_mask) { port->icount.overrun++; /* overrun error */ @@ -844,32 +867,17 @@ static int sci_handle_fifo_overrun(struct uart_port *port) struct tty_port *tport = &port->state->port; struct sci_port *s = to_sci_port(port); struct plat_sci_reg *reg; - int copied = 0, offset; - u16 status, bit; - - switch (port->type) { - case PORT_SCIF: - case PORT_HSCIF: - offset = SCLSR; - break; - case PORT_SCIFA: - case PORT_SCIFB: - offset = SCxSR; - break; - default: - return 0; - } + int copied = 0; + u16 status; - reg = sci_getreg(port, offset); + reg = sci_getreg(port, s->overrun_reg); if (!reg->size) return 0; - status = serial_port_in(port, offset); - bit = 1 << s->overrun_bit; - - if (status & bit) { - status &= ~bit; - serial_port_out(port, offset, status); + status = serial_port_in(port, s->overrun_reg); + if (status & s->overrun_mask) { + status &= ~s->overrun_mask; + serial_port_out(port, s->overrun_reg, status); port->icount.overrun++; @@ -1021,15 +1029,11 @@ static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr) ssr_status = serial_port_in(port, SCxSR); scr_status = serial_port_in(port, SCSCR); - switch (port->type) { - case PORT_SCIF: - case PORT_HSCIF: - orer_status = serial_port_in(port, SCLSR); - break; - case PORT_SCIFA: - case PORT_SCIFB: + if (s->overrun_reg == SCxSR) orer_status = ssr_status; - break; + else { + if (sci_getreg(port, s->overrun_reg)->size) + orer_status = serial_port_in(port, s->overrun_reg); } err_enabled = scr_status & port_rx_irq_mask(port); @@ -1059,7 +1063,7 @@ static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr) ret = sci_br_interrupt(irq, ptr); /* Overrun Interrupt */ - if (orer_status & (1 << s->overrun_bit)) + if (orer_status & s->overrun_mask) sci_handle_fifo_overrun(port); return ret; @@ -2073,23 +2077,9 @@ static const char *sci_type(struct uart_port *port) return NULL; } -static inline unsigned long sci_port_size(struct uart_port *port) -{ - /* - * Pick an arbitrary size that encapsulates all of the base - * registers by default. This can be optimized later, or derived - * from platform resource data at such a time that ports begin to - * behave more erratically. - */ - if (port->type == PORT_HSCIF) - return 96; - else - return 64; -} - static int sci_remap_port(struct uart_port *port) { - unsigned long size = sci_port_size(port); + struct sci_port *sport = to_sci_port(port); /* * Nothing to do if there's already an established membase. @@ -2098,7 +2088,7 @@ static int sci_remap_port(struct uart_port *port) return 0; if (port->flags & UPF_IOREMAP) { - port->membase = ioremap_nocache(port->mapbase, size); + port->membase = ioremap_nocache(port->mapbase, sport->reg_size); if (unlikely(!port->membase)) { dev_err(port->dev, "can't remap port#%d\n", port->line); return -ENXIO; @@ -2117,23 +2107,28 @@ static int sci_remap_port(struct uart_port *port) static void sci_release_port(struct uart_port *port) { + struct sci_port *sport = to_sci_port(port); + if (port->flags & UPF_IOREMAP) { iounmap(port->membase); port->membase = NULL; } - release_mem_region(port->mapbase, sci_port_size(port)); + release_mem_region(port->mapbase, sport->reg_size); } static int sci_request_port(struct uart_port *port) { - unsigned long size = sci_port_size(port); struct resource *res; + struct sci_port *sport = to_sci_port(port); int ret; - res = request_mem_region(port->mapbase, size, dev_name(port->dev)); - if (unlikely(res == NULL)) + res = request_mem_region(port->mapbase, sport->reg_size, + dev_name(port->dev)); + if (unlikely(res == NULL)) { + dev_err(port->dev, "request_mem_region failed."); return -EBUSY; + } ret = sci_remap_port(port); if (unlikely(ret != 0)) { @@ -2207,6 +2202,7 @@ static int sci_init_single(struct platform_device *dev, return -ENOMEM; port->mapbase = res->start; + sci_port->reg_size = resource_size(res); for (i = 0; i < ARRAY_SIZE(sci_port->irqs); ++i) sci_port->irqs[i] = platform_get_irq(dev, i); @@ -2234,32 +2230,38 @@ static int sci_init_single(struct platform_device *dev, switch (p->type) { case PORT_SCIFB: port->fifosize = 256; - sci_port->overrun_bit = 9; + sci_port->overrun_reg = SCxSR; + sci_port->overrun_mask = SCIFA_ORER; sampling_rate = 16; break; case PORT_HSCIF: port->fifosize = 128; sampling_rate = 0; - sci_port->overrun_bit = 0; + sci_port->overrun_reg = SCLSR; + sci_port->overrun_mask = SCLSR_ORER; break; case PORT_SCIFA: port->fifosize = 64; - sci_port->overrun_bit = 9; + sci_port->overrun_reg = SCxSR; + sci_port->overrun_mask = SCIFA_ORER; sampling_rate = 16; break; case PORT_SCIF: port->fifosize = 16; if (p->regtype == SCIx_SH7705_SCIF_REGTYPE) { - sci_port->overrun_bit = 9; + sci_port->overrun_reg = SCxSR; + sci_port->overrun_mask = SCIFA_ORER; sampling_rate = 16; } else { - sci_port->overrun_bit = 0; + sci_port->overrun_reg = SCLSR; + sci_port->overrun_mask = SCLSR_ORER; sampling_rate = 32; } break; default: port->fifosize = 1; - sci_port->overrun_bit = 5; + sci_port->overrun_reg = SCxSR; + sci_port->overrun_mask = SCI_ORER; sampling_rate = 32; break; } @@ -2304,16 +2306,12 @@ static int sci_init_single(struct platform_device *dev, sci_port->error_mask = (p->type == PORT_SCI) ? SCI_DEFAULT_ERROR_MASK : SCIF_DEFAULT_ERROR_MASK; - /* - * Establish sensible defaults for the overrun detection, unless - * the part has explicitly disabled support for it. - */ - /* * Make the error mask inclusive of overrun detection, if * supported. */ - sci_port->error_mask |= 1 << sci_port->overrun_bit; + if (sci_port->overrun_reg == SCxSR) + sci_port->error_mask |= sci_port->overrun_mask; port->type = p->type; port->flags = UPF_FIXED_PORT | p->flags; @@ -2535,6 +2533,12 @@ static const struct of_device_id of_sci_match[] = { .type = PORT_HSCIF, .regtype = SCIx_HSCIF_REGTYPE, }, + }, { + .compatible = "renesas,sci", + .data = &(const struct sci_port_info) { + .type = PORT_SCI, + .regtype = SCIx_SCI_REGTYPE, + }, }, { /* Terminator */ }, -- cgit v1.2.3