/* * 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 enum vrc4171_slot { SLOT_PROBE = 0, SLOT_NOPROBE_IO, SLOT_NOPROBE_MEM, SLOT_NOPROBE_ALL, SLOT_INITIALIZED, }; enum vrc4171_slotb { SLOTB_IS_NONE, SLOTB_IS_PCCARD, SLOTB_IS_CF, SLOTB_IS_FLASHROM, }; struct vrc4171_socket { enum vrc4171_slot slot; struct pcmcia_socket pcmcia_socket; char name[24]; int csc_irq; int io_irq; spinlock_t lock; }; static struct vrc4171_socket vrc4171_sockets[CARD_MAX_SLOTS]; static enum vrc4171_slotb 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(enum vrc4171_slotb 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) { struct vrc4171_socket *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) { struct vrc4171_socket *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) { struct vrc4171_socket *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) { struct vrc4171_socket *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) { struct vrc4171_socket *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);