diff options
Diffstat (limited to 'drivers/pcmcia/vrc4171_card.c')
| -rw-r--r-- | drivers/pcmcia/vrc4171_card.c | 758 |
1 files changed, 758 insertions, 0 deletions
diff --git a/drivers/pcmcia/vrc4171_card.c b/drivers/pcmcia/vrc4171_card.c new file mode 100644 index 000000000..21973d55a --- /dev/null +++ b/drivers/pcmcia/vrc4171_card.c @@ -0,0 +1,758 @@ +/* + * vrc4171_card.c, NEC VRC4171 Card Controller driver for Socket Services. + * + * Copyright (C) 2003-2005 Yoichi Yuasa <yuasa@linux-mips.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#include <linux/init.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/spinlock.h> +#include <linux/types.h> +#include <linux/platform_device.h> + +#include <asm/io.h> + +#include <pcmcia/ss.h> + +#include "i82365.h" + +MODULE_DESCRIPTION("NEC VRC4171 Card Controllers driver for Socket Services"); +MODULE_AUTHOR("Yoichi Yuasa <yuasa@linux-mips.org>"); +MODULE_LICENSE("GPL"); + +#define CARD_MAX_SLOTS 2 +#define CARD_SLOTA 0 +#define CARD_SLOTB 1 +#define CARD_SLOTB_OFFSET 0x40 + +#define CARD_MEM_START 0x10000000 +#define CARD_MEM_END 0x13ffffff +#define CARD_MAX_MEM_OFFSET 0x3ffffff +#define CARD_MAX_MEM_SPEED 1000 + +#define CARD_CONTROLLER_INDEX 0x03e0 +#define CARD_CONTROLLER_DATA 0x03e1 + /* Power register */ + #define VPP_GET_VCC 0x01 + #define POWER_ENABLE 0x10 + #define CARD_VOLTAGE_SENSE 0x1f + #define VCC_3VORXV_CAPABLE 0x00 + #define VCC_XV_ONLY 0x01 + #define VCC_3V_CAPABLE 0x02 + #define VCC_5V_ONLY 0x03 + #define CARD_VOLTAGE_SELECT 0x2f + #define VCC_3V 0x01 + #define VCC_5V 0x00 + #define VCC_XV 0x02 + #define VCC_STATUS_3V 0x02 + #define VCC_STATUS_5V 0x01 + #define VCC_STATUS_XV 0x03 + #define GLOBAL_CONTROL 0x1e + #define EXWRBK 0x04 + #define IRQPM_EN 0x08 + #define CLRPMIRQ 0x10 + +#define INTERRUPT_STATUS 0x05fa + #define IRQ_A 0x02 + #define IRQ_B 0x04 + +#define CONFIGURATION1 0x05fe + #define SLOTB_CONFIG 0xc000 + #define SLOTB_NONE 0x0000 + #define SLOTB_PCCARD 0x4000 + #define SLOTB_CF 0x8000 + #define SLOTB_FLASHROM 0xc000 + +#define CARD_CONTROLLER_START CARD_CONTROLLER_INDEX +#define CARD_CONTROLLER_END CARD_CONTROLLER_DATA + +#define IO_MAX_MAPS 2 +#define MEM_MAX_MAPS 5 + +typedef enum { + SLOT_PROBE = 0, + SLOT_NOPROBE_IO, + SLOT_NOPROBE_MEM, + SLOT_NOPROBE_ALL, + SLOT_INITIALIZED, +} vrc4171_slot_t; + +typedef enum { + SLOTB_IS_NONE, + SLOTB_IS_PCCARD, + SLOTB_IS_CF, + SLOTB_IS_FLASHROM, +} vrc4171_slotb_t; + +typedef struct vrc4171_socket { + vrc4171_slot_t slot; + struct pcmcia_socket pcmcia_socket; + char name[24]; + int csc_irq; + int io_irq; + spinlock_t lock; +} vrc4171_socket_t; + +static vrc4171_socket_t vrc4171_sockets[CARD_MAX_SLOTS]; +static vrc4171_slotb_t vrc4171_slotb = SLOTB_IS_NONE; +static char vrc4171_card_name[] = "NEC VRC4171 Card Controller"; +static unsigned int vrc4171_irq; +static uint16_t vrc4171_irq_mask = 0xdeb8; + +static struct resource vrc4171_card_resource[3] = { + { .name = vrc4171_card_name, + .start = CARD_CONTROLLER_START, + .end = CARD_CONTROLLER_END, + .flags = IORESOURCE_IO, }, + { .name = vrc4171_card_name, + .start = INTERRUPT_STATUS, + .end = INTERRUPT_STATUS, + .flags = IORESOURCE_IO, }, + { .name = vrc4171_card_name, + .start = CONFIGURATION1, + .end = CONFIGURATION1, + .flags = IORESOURCE_IO, }, +}; + +static struct platform_device vrc4171_card_device = { + .name = vrc4171_card_name, + .id = 0, + .num_resources = 3, + .resource = vrc4171_card_resource, +}; + +static inline uint16_t vrc4171_get_irq_status(void) +{ + return inw(INTERRUPT_STATUS); +} + +static inline void vrc4171_set_multifunction_pin(vrc4171_slotb_t config) +{ + uint16_t config1; + + config1 = inw(CONFIGURATION1); + config1 &= ~SLOTB_CONFIG; + + switch (config) { + case SLOTB_IS_NONE: + config1 |= SLOTB_NONE; + break; + case SLOTB_IS_PCCARD: + config1 |= SLOTB_PCCARD; + break; + case SLOTB_IS_CF: + config1 |= SLOTB_CF; + break; + case SLOTB_IS_FLASHROM: + config1 |= SLOTB_FLASHROM; + break; + default: + break; + } + + outw(config1, CONFIGURATION1); +} + +static inline uint8_t exca_read_byte(int slot, uint8_t index) +{ + if (slot == CARD_SLOTB) + index += CARD_SLOTB_OFFSET; + + outb(index, CARD_CONTROLLER_INDEX); + return inb(CARD_CONTROLLER_DATA); +} + +static inline uint16_t exca_read_word(int slot, uint8_t index) +{ + uint16_t data; + + if (slot == CARD_SLOTB) + index += CARD_SLOTB_OFFSET; + + outb(index++, CARD_CONTROLLER_INDEX); + data = inb(CARD_CONTROLLER_DATA); + + outb(index, CARD_CONTROLLER_INDEX); + data |= ((uint16_t)inb(CARD_CONTROLLER_DATA)) << 8; + + return data; +} + +static inline uint8_t exca_write_byte(int slot, uint8_t index, uint8_t data) +{ + if (slot == CARD_SLOTB) + index += CARD_SLOTB_OFFSET; + + outb(index, CARD_CONTROLLER_INDEX); + outb(data, CARD_CONTROLLER_DATA); + + return data; +} + +static inline uint16_t exca_write_word(int slot, uint8_t index, uint16_t data) +{ + if (slot == CARD_SLOTB) + index += CARD_SLOTB_OFFSET; + + outb(index++, CARD_CONTROLLER_INDEX); + outb(data, CARD_CONTROLLER_DATA); + + outb(index, CARD_CONTROLLER_INDEX); + outb((uint8_t)(data >> 8), CARD_CONTROLLER_DATA); + + return data; +} + +static inline int search_nonuse_irq(void) +{ + int i; + + for (i = 0; i < 16; i++) { + if (vrc4171_irq_mask & (1 << i)) { + vrc4171_irq_mask &= ~(1 << i); + return i; + } + } + + return -1; +} + +static int pccard_init(struct pcmcia_socket *sock) +{ + vrc4171_socket_t *socket; + unsigned int slot; + + sock->features |= SS_CAP_PCCARD | SS_CAP_PAGE_REGS; + sock->irq_mask = 0; + sock->map_size = 0x1000; + sock->pci_irq = vrc4171_irq; + + slot = sock->sock; + socket = &vrc4171_sockets[slot]; + socket->csc_irq = search_nonuse_irq(); + socket->io_irq = search_nonuse_irq(); + spin_lock_init(&socket->lock); + + return 0; +} + +static int pccard_get_status(struct pcmcia_socket *sock, u_int *value) +{ + unsigned int slot; + uint8_t status, sense; + u_int val = 0; + + if (sock == NULL || sock->sock >= CARD_MAX_SLOTS || value == NULL) + return -EINVAL; + + slot = sock->sock; + + status = exca_read_byte(slot, I365_STATUS); + if (exca_read_byte(slot, I365_INTCTL) & I365_PC_IOCARD) { + if (status & I365_CS_STSCHG) + val |= SS_STSCHG; + } else { + if (!(status & I365_CS_BVD1)) + val |= SS_BATDEAD; + else if ((status & (I365_CS_BVD1 | I365_CS_BVD2)) == I365_CS_BVD1) + val |= SS_BATWARN; + } + if ((status & I365_CS_DETECT) == I365_CS_DETECT) + val |= SS_DETECT; + if (status & I365_CS_WRPROT) + val |= SS_WRPROT; + if (status & I365_CS_READY) + val |= SS_READY; + if (status & I365_CS_POWERON) + val |= SS_POWERON; + + sense = exca_read_byte(slot, CARD_VOLTAGE_SENSE); + switch (sense) { + case VCC_3VORXV_CAPABLE: + val |= SS_3VCARD | SS_XVCARD; + break; + case VCC_XV_ONLY: + val |= SS_XVCARD; + break; + case VCC_3V_CAPABLE: + val |= SS_3VCARD; + break; + default: + /* 5V only */ + break; + } + + *value = val; + + return 0; +} + +static inline uint8_t set_Vcc_value(u_char Vcc) +{ + switch (Vcc) { + case 33: + return VCC_3V; + case 50: + return VCC_5V; + } + + /* Small voltage is chosen for safety. */ + return VCC_3V; +} + +static int pccard_set_socket(struct pcmcia_socket *sock, socket_state_t *state) +{ + vrc4171_socket_t *socket; + unsigned int slot; + uint8_t voltage, power, control, cscint; + + if (sock == NULL || sock->sock >= CARD_MAX_SLOTS || + (state->Vpp != state->Vcc && state->Vpp != 0) || + (state->Vcc != 50 && state->Vcc != 33 && state->Vcc != 0)) + return -EINVAL; + + slot = sock->sock; + socket = &vrc4171_sockets[slot]; + + spin_lock_irq(&socket->lock); + + voltage = set_Vcc_value(state->Vcc); + exca_write_byte(slot, CARD_VOLTAGE_SELECT, voltage); + + power = POWER_ENABLE; + if (state->Vpp == state->Vcc) + power |= VPP_GET_VCC; + if (state->flags & SS_OUTPUT_ENA) + power |= I365_PWR_OUT; + exca_write_byte(slot, I365_POWER, power); + + control = 0; + if (state->io_irq != 0) + control |= socket->io_irq; + if (state->flags & SS_IOCARD) + control |= I365_PC_IOCARD; + if (state->flags & SS_RESET) + control &= ~I365_PC_RESET; + else + control |= I365_PC_RESET; + exca_write_byte(slot, I365_INTCTL, control); + + cscint = 0; + exca_write_byte(slot, I365_CSCINT, cscint); + exca_read_byte(slot, I365_CSC); /* clear CardStatus change */ + if (state->csc_mask != 0) + cscint |= socket->csc_irq << 8; + if (state->flags & SS_IOCARD) { + if (state->csc_mask & SS_STSCHG) + cscint |= I365_CSC_STSCHG; + } else { + if (state->csc_mask & SS_BATDEAD) + cscint |= I365_CSC_BVD1; + if (state->csc_mask & SS_BATWARN) + cscint |= I365_CSC_BVD2; + } + if (state->csc_mask & SS_READY) + cscint |= I365_CSC_READY; + if (state->csc_mask & SS_DETECT) + cscint |= I365_CSC_DETECT; + exca_write_byte(slot, I365_CSCINT, cscint); + + spin_unlock_irq(&socket->lock); + + return 0; +} + +static int pccard_set_io_map(struct pcmcia_socket *sock, struct pccard_io_map *io) +{ + unsigned int slot; + uint8_t ioctl, addrwin; + u_char map; + + if (sock == NULL || sock->sock >= CARD_MAX_SLOTS || + io == NULL || io->map >= IO_MAX_MAPS || + io->start > 0xffff || io->stop > 0xffff || io->start > io->stop) + return -EINVAL; + + slot = sock->sock; + map = io->map; + + addrwin = exca_read_byte(slot, I365_ADDRWIN); + if (addrwin & I365_ENA_IO(map)) { + addrwin &= ~I365_ENA_IO(map); + exca_write_byte(slot, I365_ADDRWIN, addrwin); + } + + exca_write_word(slot, I365_IO(map)+I365_W_START, io->start); + exca_write_word(slot, I365_IO(map)+I365_W_STOP, io->stop); + + ioctl = 0; + if (io->speed > 0) + ioctl |= I365_IOCTL_WAIT(map); + if (io->flags & MAP_16BIT) + ioctl |= I365_IOCTL_16BIT(map); + if (io->flags & MAP_AUTOSZ) + ioctl |= I365_IOCTL_IOCS16(map); + if (io->flags & MAP_0WS) + ioctl |= I365_IOCTL_0WS(map); + exca_write_byte(slot, I365_IOCTL, ioctl); + + if (io->flags & MAP_ACTIVE) { + addrwin |= I365_ENA_IO(map); + exca_write_byte(slot, I365_ADDRWIN, addrwin); + } + + return 0; +} + +static int pccard_set_mem_map(struct pcmcia_socket *sock, struct pccard_mem_map *mem) +{ + unsigned int slot; + uint16_t start, stop, offset; + uint8_t addrwin; + u_char map; + + if (sock == NULL || sock->sock >= CARD_MAX_SLOTS || + mem == NULL || mem->map >= MEM_MAX_MAPS || + mem->res->start < CARD_MEM_START || mem->res->start > CARD_MEM_END || + mem->res->end < CARD_MEM_START || mem->res->end > CARD_MEM_END || + mem->res->start > mem->res->end || + mem->card_start > CARD_MAX_MEM_OFFSET || + mem->speed > CARD_MAX_MEM_SPEED) + return -EINVAL; + + slot = sock->sock; + map = mem->map; + + addrwin = exca_read_byte(slot, I365_ADDRWIN); + if (addrwin & I365_ENA_MEM(map)) { + addrwin &= ~I365_ENA_MEM(map); + exca_write_byte(slot, I365_ADDRWIN, addrwin); + } + + start = (mem->res->start >> 12) & 0x3fff; + if (mem->flags & MAP_16BIT) + start |= I365_MEM_16BIT; + exca_write_word(slot, I365_MEM(map)+I365_W_START, start); + + stop = (mem->res->end >> 12) & 0x3fff; + switch (mem->speed) { + case 0: + break; + case 1: + stop |= I365_MEM_WS0; + break; + case 2: + stop |= I365_MEM_WS1; + break; + default: + stop |= I365_MEM_WS0 | I365_MEM_WS1; + break; + } + exca_write_word(slot, I365_MEM(map)+I365_W_STOP, stop); + + offset = (mem->card_start >> 12) & 0x3fff; + if (mem->flags & MAP_ATTRIB) + offset |= I365_MEM_REG; + if (mem->flags & MAP_WRPROT) + offset |= I365_MEM_WRPROT; + exca_write_word(slot, I365_MEM(map)+I365_W_OFF, offset); + + if (mem->flags & MAP_ACTIVE) { + addrwin |= I365_ENA_MEM(map); + exca_write_byte(slot, I365_ADDRWIN, addrwin); + } + + return 0; +} + +static struct pccard_operations vrc4171_pccard_operations = { + .init = pccard_init, + .get_status = pccard_get_status, + .set_socket = pccard_set_socket, + .set_io_map = pccard_set_io_map, + .set_mem_map = pccard_set_mem_map, +}; + +static inline unsigned int get_events(int slot) +{ + unsigned int events = 0; + uint8_t status, csc; + + status = exca_read_byte(slot, I365_STATUS); + csc = exca_read_byte(slot, I365_CSC); + + if (exca_read_byte(slot, I365_INTCTL) & I365_PC_IOCARD) { + if ((csc & I365_CSC_STSCHG) && (status & I365_CS_STSCHG)) + events |= SS_STSCHG; + } else { + if (csc & (I365_CSC_BVD1 | I365_CSC_BVD2)) { + if (!(status & I365_CS_BVD1)) + events |= SS_BATDEAD; + else if ((status & (I365_CS_BVD1 | I365_CS_BVD2)) == I365_CS_BVD1) + events |= SS_BATWARN; + } + } + if ((csc & I365_CSC_READY) && (status & I365_CS_READY)) + events |= SS_READY; + if ((csc & I365_CSC_DETECT) && ((status & I365_CS_DETECT) == I365_CS_DETECT)) + events |= SS_DETECT; + + return events; +} + +static irqreturn_t pccard_interrupt(int irq, void *dev_id) +{ + vrc4171_socket_t *socket; + unsigned int events; + irqreturn_t retval = IRQ_NONE; + uint16_t status; + + status = vrc4171_get_irq_status(); + if (status & IRQ_A) { + socket = &vrc4171_sockets[CARD_SLOTA]; + if (socket->slot == SLOT_INITIALIZED) { + if (status & (1 << socket->csc_irq)) { + events = get_events(CARD_SLOTA); + if (events != 0) { + pcmcia_parse_events(&socket->pcmcia_socket, events); + retval = IRQ_HANDLED; + } + } + } + } + + if (status & IRQ_B) { + socket = &vrc4171_sockets[CARD_SLOTB]; + if (socket->slot == SLOT_INITIALIZED) { + if (status & (1 << socket->csc_irq)) { + events = get_events(CARD_SLOTB); + if (events != 0) { + pcmcia_parse_events(&socket->pcmcia_socket, events); + retval = IRQ_HANDLED; + } + } + } + } + + return retval; +} + +static inline void reserve_using_irq(int slot) +{ + unsigned int irq; + + irq = exca_read_byte(slot, I365_INTCTL); + irq &= 0x0f; + vrc4171_irq_mask &= ~(1 << irq); + + irq = exca_read_byte(slot, I365_CSCINT); + irq = (irq & 0xf0) >> 4; + vrc4171_irq_mask &= ~(1 << irq); +} + +static int vrc4171_add_sockets(void) +{ + vrc4171_socket_t *socket; + int slot, retval; + + for (slot = 0; slot < CARD_MAX_SLOTS; slot++) { + if (slot == CARD_SLOTB && vrc4171_slotb == SLOTB_IS_NONE) + continue; + + socket = &vrc4171_sockets[slot]; + if (socket->slot != SLOT_PROBE) { + uint8_t addrwin; + + switch (socket->slot) { + case SLOT_NOPROBE_MEM: + addrwin = exca_read_byte(slot, I365_ADDRWIN); + addrwin &= 0x1f; + exca_write_byte(slot, I365_ADDRWIN, addrwin); + break; + case SLOT_NOPROBE_IO: + addrwin = exca_read_byte(slot, I365_ADDRWIN); + addrwin &= 0xc0; + exca_write_byte(slot, I365_ADDRWIN, addrwin); + break; + default: + break; + } + + reserve_using_irq(slot); + continue; + } + + sprintf(socket->name, "NEC VRC4171 Card Slot %1c", 'A' + slot); + socket->pcmcia_socket.dev.parent = &vrc4171_card_device.dev; + socket->pcmcia_socket.ops = &vrc4171_pccard_operations; + socket->pcmcia_socket.owner = THIS_MODULE; + + retval = pcmcia_register_socket(&socket->pcmcia_socket); + if (retval < 0) + return retval; + + exca_write_byte(slot, I365_ADDRWIN, 0); + exca_write_byte(slot, GLOBAL_CONTROL, 0); + + socket->slot = SLOT_INITIALIZED; + } + + return 0; +} + +static void vrc4171_remove_sockets(void) +{ + vrc4171_socket_t *socket; + int slot; + + for (slot = 0; slot < CARD_MAX_SLOTS; slot++) { + if (slot == CARD_SLOTB && vrc4171_slotb == SLOTB_IS_NONE) + continue; + + socket = &vrc4171_sockets[slot]; + if (socket->slot == SLOT_INITIALIZED) + pcmcia_unregister_socket(&socket->pcmcia_socket); + + socket->slot = SLOT_PROBE; + } +} + +static int vrc4171_card_setup(char *options) +{ + if (options == NULL || *options == '\0') + return 1; + + if (strncmp(options, "irq:", 4) == 0) { + int irq; + options += 4; + irq = simple_strtoul(options, &options, 0); + if (irq >= 0 && irq < nr_irqs) + vrc4171_irq = irq; + + if (*options != ',') + return 1; + options++; + } + + if (strncmp(options, "slota:", 6) == 0) { + options += 6; + if (*options != '\0') { + if (strncmp(options, "memnoprobe", 10) == 0) { + vrc4171_sockets[CARD_SLOTA].slot = SLOT_NOPROBE_MEM; + options += 10; + } else if (strncmp(options, "ionoprobe", 9) == 0) { + vrc4171_sockets[CARD_SLOTA].slot = SLOT_NOPROBE_IO; + options += 9; + } else if ( strncmp(options, "noprobe", 7) == 0) { + vrc4171_sockets[CARD_SLOTA].slot = SLOT_NOPROBE_ALL; + options += 7; + } + + if (*options != ',') + return 1; + options++; + } else + return 1; + + } + + if (strncmp(options, "slotb:", 6) == 0) { + options += 6; + if (*options != '\0') { + if (strncmp(options, "pccard", 6) == 0) { + vrc4171_slotb = SLOTB_IS_PCCARD; + options += 6; + } else if (strncmp(options, "cf", 2) == 0) { + vrc4171_slotb = SLOTB_IS_CF; + options += 2; + } else if (strncmp(options, "flashrom", 8) == 0) { + vrc4171_slotb = SLOTB_IS_FLASHROM; + options += 8; + } else if (strncmp(options, "none", 4) == 0) { + vrc4171_slotb = SLOTB_IS_NONE; + options += 4; + } + + if (*options != ',') + return 1; + options++; + + if (strncmp(options, "memnoprobe", 10) == 0) + vrc4171_sockets[CARD_SLOTB].slot = SLOT_NOPROBE_MEM; + if (strncmp(options, "ionoprobe", 9) == 0) + vrc4171_sockets[CARD_SLOTB].slot = SLOT_NOPROBE_IO; + if (strncmp(options, "noprobe", 7) == 0) + vrc4171_sockets[CARD_SLOTB].slot = SLOT_NOPROBE_ALL; + } + } + + return 1; +} + +__setup("vrc4171_card=", vrc4171_card_setup); + +static struct platform_driver vrc4171_card_driver = { + .driver = { + .name = vrc4171_card_name, + }, +}; + +static int vrc4171_card_init(void) +{ + int retval; + + retval = platform_driver_register(&vrc4171_card_driver); + if (retval < 0) + return retval; + + retval = platform_device_register(&vrc4171_card_device); + if (retval < 0) { + platform_driver_unregister(&vrc4171_card_driver); + return retval; + } + + vrc4171_set_multifunction_pin(vrc4171_slotb); + + retval = vrc4171_add_sockets(); + if (retval == 0) + retval = request_irq(vrc4171_irq, pccard_interrupt, IRQF_SHARED, + vrc4171_card_name, vrc4171_sockets); + + if (retval < 0) { + vrc4171_remove_sockets(); + platform_device_unregister(&vrc4171_card_device); + platform_driver_unregister(&vrc4171_card_driver); + return retval; + } + + printk(KERN_INFO "%s, connected to IRQ %d\n", + vrc4171_card_driver.driver.name, vrc4171_irq); + + return 0; +} + +static void vrc4171_card_exit(void) +{ + free_irq(vrc4171_irq, vrc4171_sockets); + vrc4171_remove_sockets(); + platform_device_unregister(&vrc4171_card_device); + platform_driver_unregister(&vrc4171_card_driver); +} + +module_init(vrc4171_card_init); +module_exit(vrc4171_card_exit); |