463 lines
11 KiB
C
463 lines
11 KiB
C
/*
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* tifm_7xx1.c - TI FlashMedia driver
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*
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* Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/tifm.h>
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#include <linux/dma-mapping.h>
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#include <linux/freezer.h>
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#define DRIVER_NAME "tifm_7xx1"
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#define DRIVER_VERSION "0.7"
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static void tifm_7xx1_eject(struct tifm_adapter *fm, struct tifm_dev *sock)
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{
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unsigned long flags;
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spin_lock_irqsave(&fm->lock, flags);
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fm->socket_change_set |= 1 << sock->socket_id;
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wake_up_all(&fm->change_set_notify);
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spin_unlock_irqrestore(&fm->lock, flags);
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}
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static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
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{
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struct tifm_adapter *fm = dev_id;
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struct tifm_dev *sock;
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unsigned int irq_status;
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unsigned int sock_irq_status, cnt;
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spin_lock(&fm->lock);
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irq_status = readl(fm->addr + FM_INTERRUPT_STATUS);
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if (irq_status == 0 || irq_status == (~0)) {
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spin_unlock(&fm->lock);
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return IRQ_NONE;
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}
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if (irq_status & TIFM_IRQ_ENABLE) {
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writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
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for (cnt = 0; cnt < fm->num_sockets; cnt++) {
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sock = fm->sockets[cnt];
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sock_irq_status = (irq_status >> cnt)
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& (TIFM_IRQ_FIFOMASK(1)
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| TIFM_IRQ_CARDMASK(1));
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if (sock && sock_irq_status)
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sock->signal_irq(sock, sock_irq_status);
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}
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fm->socket_change_set |= irq_status
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& ((1 << fm->num_sockets) - 1);
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}
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writel(irq_status, fm->addr + FM_INTERRUPT_STATUS);
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if (!fm->socket_change_set)
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writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
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else
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wake_up_all(&fm->change_set_notify);
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spin_unlock(&fm->lock);
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return IRQ_HANDLED;
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}
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static tifm_media_id tifm_7xx1_toggle_sock_power(char __iomem *sock_addr, int is_x2)
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{
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unsigned int s_state;
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int cnt;
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writel(0x0e00, sock_addr + SOCK_CONTROL);
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for (cnt = 0; cnt < 100; cnt++) {
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if (!(TIFM_SOCK_STATE_POWERED &
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readl(sock_addr + SOCK_PRESENT_STATE)))
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break;
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msleep(10);
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}
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s_state = readl(sock_addr + SOCK_PRESENT_STATE);
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if (!(TIFM_SOCK_STATE_OCCUPIED & s_state))
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return FM_NULL;
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if (is_x2) {
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writel((s_state & 7) | 0x0c00, sock_addr + SOCK_CONTROL);
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} else {
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// SmartMedia cards need extra 40 msec
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if (((readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7) == 1)
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msleep(40);
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writel(readl(sock_addr + SOCK_CONTROL) | TIFM_CTRL_LED,
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sock_addr + SOCK_CONTROL);
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msleep(10);
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writel((s_state & 0x7) | 0x0c00 | TIFM_CTRL_LED,
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sock_addr + SOCK_CONTROL);
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}
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for (cnt = 0; cnt < 100; cnt++) {
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if ((TIFM_SOCK_STATE_POWERED &
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readl(sock_addr + SOCK_PRESENT_STATE)))
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break;
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msleep(10);
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}
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if (!is_x2)
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writel(readl(sock_addr + SOCK_CONTROL) & (~TIFM_CTRL_LED),
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sock_addr + SOCK_CONTROL);
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return (readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7;
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}
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inline static char __iomem *
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tifm_7xx1_sock_addr(char __iomem *base_addr, unsigned int sock_num)
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{
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return base_addr + ((sock_num + 1) << 10);
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}
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static int tifm_7xx1_switch_media(void *data)
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{
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struct tifm_adapter *fm = data;
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unsigned long flags;
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tifm_media_id media_id;
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char *card_name = "xx";
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int cnt, rc;
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struct tifm_dev *sock;
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unsigned int socket_change_set;
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while (1) {
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rc = wait_event_interruptible(fm->change_set_notify,
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fm->socket_change_set);
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if (rc == -ERESTARTSYS)
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try_to_freeze();
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spin_lock_irqsave(&fm->lock, flags);
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socket_change_set = fm->socket_change_set;
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fm->socket_change_set = 0;
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dev_dbg(fm->dev, "checking media set %x\n",
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socket_change_set);
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if (kthread_should_stop())
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socket_change_set = (1 << fm->num_sockets) - 1;
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spin_unlock_irqrestore(&fm->lock, flags);
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if (!socket_change_set)
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continue;
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spin_lock_irqsave(&fm->lock, flags);
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for (cnt = 0; cnt < fm->num_sockets; cnt++) {
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if (!(socket_change_set & (1 << cnt)))
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continue;
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sock = fm->sockets[cnt];
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if (sock) {
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printk(KERN_INFO DRIVER_NAME
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": demand removing card from socket %d\n",
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cnt);
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fm->sockets[cnt] = NULL;
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spin_unlock_irqrestore(&fm->lock, flags);
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device_unregister(&sock->dev);
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spin_lock_irqsave(&fm->lock, flags);
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writel(0x0e00,
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tifm_7xx1_sock_addr(fm->addr, cnt)
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+ SOCK_CONTROL);
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}
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if (kthread_should_stop())
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continue;
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spin_unlock_irqrestore(&fm->lock, flags);
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media_id = tifm_7xx1_toggle_sock_power(
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tifm_7xx1_sock_addr(fm->addr, cnt),
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fm->num_sockets == 2);
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if (media_id) {
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sock = tifm_alloc_device(fm);
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if (sock) {
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sock->addr = tifm_7xx1_sock_addr(fm->addr,
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cnt);
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sock->media_id = media_id;
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sock->socket_id = cnt;
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switch (media_id) {
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case 1:
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card_name = "xd";
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break;
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case 2:
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card_name = "ms";
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break;
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case 3:
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card_name = "sd";
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break;
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default:
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tifm_free_device(&sock->dev);
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spin_lock_irqsave(&fm->lock, flags);
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continue;
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}
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snprintf(sock->dev.bus_id, BUS_ID_SIZE,
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"tifm_%s%u:%u", card_name, fm->id, cnt);
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printk(KERN_INFO DRIVER_NAME
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": %s card detected in socket %d\n",
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card_name, cnt);
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if (!device_register(&sock->dev)) {
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spin_lock_irqsave(&fm->lock, flags);
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if (!fm->sockets[cnt]) {
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fm->sockets[cnt] = sock;
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sock = NULL;
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}
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spin_unlock_irqrestore(&fm->lock, flags);
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}
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if (sock)
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tifm_free_device(&sock->dev);
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}
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spin_lock_irqsave(&fm->lock, flags);
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}
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}
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if (!kthread_should_stop()) {
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writel(TIFM_IRQ_FIFOMASK(socket_change_set)
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| TIFM_IRQ_CARDMASK(socket_change_set),
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fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
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writel(TIFM_IRQ_FIFOMASK(socket_change_set)
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| TIFM_IRQ_CARDMASK(socket_change_set),
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fm->addr + FM_SET_INTERRUPT_ENABLE);
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writel(TIFM_IRQ_ENABLE,
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fm->addr + FM_SET_INTERRUPT_ENABLE);
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spin_unlock_irqrestore(&fm->lock, flags);
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} else {
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for (cnt = 0; cnt < fm->num_sockets; cnt++) {
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if (fm->sockets[cnt])
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fm->socket_change_set |= 1 << cnt;
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}
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if (!fm->socket_change_set) {
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spin_unlock_irqrestore(&fm->lock, flags);
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return 0;
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} else {
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spin_unlock_irqrestore(&fm->lock, flags);
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}
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}
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}
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return 0;
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}
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#ifdef CONFIG_PM
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static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state)
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{
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dev_dbg(&dev->dev, "suspending host\n");
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pci_save_state(dev);
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pci_enable_wake(dev, pci_choose_state(dev, state), 0);
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pci_disable_device(dev);
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pci_set_power_state(dev, pci_choose_state(dev, state));
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return 0;
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}
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static int tifm_7xx1_resume(struct pci_dev *dev)
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{
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struct tifm_adapter *fm = pci_get_drvdata(dev);
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int cnt, rc;
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unsigned long flags;
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tifm_media_id new_ids[fm->num_sockets];
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pci_set_power_state(dev, PCI_D0);
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pci_restore_state(dev);
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rc = pci_enable_device(dev);
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if (rc)
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return rc;
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pci_set_master(dev);
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dev_dbg(&dev->dev, "resuming host\n");
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for (cnt = 0; cnt < fm->num_sockets; cnt++)
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new_ids[cnt] = tifm_7xx1_toggle_sock_power(
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tifm_7xx1_sock_addr(fm->addr, cnt),
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fm->num_sockets == 2);
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spin_lock_irqsave(&fm->lock, flags);
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fm->socket_change_set = 0;
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for (cnt = 0; cnt < fm->num_sockets; cnt++) {
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if (fm->sockets[cnt]) {
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if (fm->sockets[cnt]->media_id == new_ids[cnt])
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fm->socket_change_set |= 1 << cnt;
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fm->sockets[cnt]->media_id = new_ids[cnt];
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}
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}
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writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
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fm->addr + FM_SET_INTERRUPT_ENABLE);
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if (!fm->socket_change_set) {
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spin_unlock_irqrestore(&fm->lock, flags);
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return 0;
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} else {
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fm->socket_change_set = 0;
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spin_unlock_irqrestore(&fm->lock, flags);
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}
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wait_event_timeout(fm->change_set_notify, fm->socket_change_set, HZ);
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spin_lock_irqsave(&fm->lock, flags);
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writel(TIFM_IRQ_FIFOMASK(fm->socket_change_set)
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| TIFM_IRQ_CARDMASK(fm->socket_change_set),
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fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
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writel(TIFM_IRQ_FIFOMASK(fm->socket_change_set)
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| TIFM_IRQ_CARDMASK(fm->socket_change_set),
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fm->addr + FM_SET_INTERRUPT_ENABLE);
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writel(TIFM_IRQ_ENABLE,
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fm->addr + FM_SET_INTERRUPT_ENABLE);
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fm->socket_change_set = 0;
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spin_unlock_irqrestore(&fm->lock, flags);
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return 0;
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}
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#else
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#define tifm_7xx1_suspend NULL
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#define tifm_7xx1_resume NULL
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#endif /* CONFIG_PM */
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static int tifm_7xx1_probe(struct pci_dev *dev,
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const struct pci_device_id *dev_id)
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{
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struct tifm_adapter *fm;
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int pci_dev_busy = 0;
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int rc;
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rc = pci_set_dma_mask(dev, DMA_32BIT_MASK);
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if (rc)
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return rc;
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rc = pci_enable_device(dev);
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if (rc)
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return rc;
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pci_set_master(dev);
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rc = pci_request_regions(dev, DRIVER_NAME);
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if (rc) {
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pci_dev_busy = 1;
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goto err_out;
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}
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pci_intx(dev, 1);
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fm = tifm_alloc_adapter();
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if (!fm) {
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rc = -ENOMEM;
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goto err_out_int;
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}
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fm->dev = &dev->dev;
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fm->num_sockets = (dev->device == PCI_DEVICE_ID_TI_XX21_XX11_FM)
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? 4 : 2;
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fm->sockets = kzalloc(sizeof(struct tifm_dev*) * fm->num_sockets,
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GFP_KERNEL);
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if (!fm->sockets)
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goto err_out_free;
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fm->eject = tifm_7xx1_eject;
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pci_set_drvdata(dev, fm);
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fm->addr = ioremap(pci_resource_start(dev, 0),
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pci_resource_len(dev, 0));
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if (!fm->addr)
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goto err_out_free;
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rc = request_irq(dev->irq, tifm_7xx1_isr, SA_SHIRQ, DRIVER_NAME, fm);
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if (rc)
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goto err_out_unmap;
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init_waitqueue_head(&fm->change_set_notify);
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rc = tifm_add_adapter(fm, tifm_7xx1_switch_media);
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if (rc)
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goto err_out_irq;
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writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
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writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
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fm->addr + FM_SET_INTERRUPT_ENABLE);
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wake_up_process(fm->media_switcher);
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return 0;
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err_out_irq:
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free_irq(dev->irq, fm);
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err_out_unmap:
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iounmap(fm->addr);
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err_out_free:
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pci_set_drvdata(dev, NULL);
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tifm_free_adapter(fm);
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err_out_int:
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pci_intx(dev, 0);
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pci_release_regions(dev);
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err_out:
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if (!pci_dev_busy)
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pci_disable_device(dev);
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return rc;
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}
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static void tifm_7xx1_remove(struct pci_dev *dev)
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{
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struct tifm_adapter *fm = pci_get_drvdata(dev);
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unsigned long flags;
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writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
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mmiowb();
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free_irq(dev->irq, fm);
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spin_lock_irqsave(&fm->lock, flags);
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fm->socket_change_set = (1 << fm->num_sockets) - 1;
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spin_unlock_irqrestore(&fm->lock, flags);
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kthread_stop(fm->media_switcher);
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tifm_remove_adapter(fm);
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pci_set_drvdata(dev, NULL);
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iounmap(fm->addr);
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pci_intx(dev, 0);
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pci_release_regions(dev);
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pci_disable_device(dev);
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tifm_free_adapter(fm);
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}
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static struct pci_device_id tifm_7xx1_pci_tbl [] = {
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{ PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX21_XX11_FM, PCI_ANY_ID,
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PCI_ANY_ID, 0, 0, 0 }, /* xx21 - the one I have */
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{ PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX12_FM, PCI_ANY_ID,
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PCI_ANY_ID, 0, 0, 0 },
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{ PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX20_FM, PCI_ANY_ID,
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PCI_ANY_ID, 0, 0, 0 },
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{ }
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};
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static struct pci_driver tifm_7xx1_driver = {
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.name = DRIVER_NAME,
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.id_table = tifm_7xx1_pci_tbl,
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.probe = tifm_7xx1_probe,
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.remove = tifm_7xx1_remove,
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.suspend = tifm_7xx1_suspend,
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.resume = tifm_7xx1_resume,
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};
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static int __init tifm_7xx1_init(void)
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{
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return pci_register_driver(&tifm_7xx1_driver);
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}
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static void __exit tifm_7xx1_exit(void)
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{
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pci_unregister_driver(&tifm_7xx1_driver);
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}
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MODULE_AUTHOR("Alex Dubov");
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MODULE_DESCRIPTION("TI FlashMedia host driver");
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MODULE_LICENSE("GPL");
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MODULE_DEVICE_TABLE(pci, tifm_7xx1_pci_tbl);
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MODULE_VERSION(DRIVER_VERSION);
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module_init(tifm_7xx1_init);
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module_exit(tifm_7xx1_exit);
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