688 lines
17 KiB
C
688 lines
17 KiB
C
/*
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* TI FlashMedia driver
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*
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* Copyright (C) 2007 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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* Special thanks to Carlos Corbacho for providing various MemoryStick cards
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* that made this driver possible.
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*
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*/
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#include <linux/tifm.h>
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#include <linux/memstick.h>
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#include <linux/highmem.h>
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#include <linux/scatterlist.h>
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#include <linux/log2.h>
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#include <linux/module.h>
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#include <asm/io.h>
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#define DRIVER_NAME "tifm_ms"
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static bool no_dma;
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module_param(no_dma, bool, 0644);
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/*
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* Some control bits of TIFM appear to conform to Sony's reference design,
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* so I'm just assuming they all are.
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*/
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#define TIFM_MS_STAT_DRQ 0x04000
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#define TIFM_MS_STAT_MSINT 0x02000
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#define TIFM_MS_STAT_RDY 0x01000
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#define TIFM_MS_STAT_CRC 0x00200
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#define TIFM_MS_STAT_TOE 0x00100
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#define TIFM_MS_STAT_EMP 0x00020
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#define TIFM_MS_STAT_FUL 0x00010
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#define TIFM_MS_STAT_CED 0x00008
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#define TIFM_MS_STAT_ERR 0x00004
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#define TIFM_MS_STAT_BRQ 0x00002
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#define TIFM_MS_STAT_CNK 0x00001
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#define TIFM_MS_SYS_DMA 0x10000
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#define TIFM_MS_SYS_RESET 0x08000
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#define TIFM_MS_SYS_SRAC 0x04000
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#define TIFM_MS_SYS_INTEN 0x02000
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#define TIFM_MS_SYS_NOCRC 0x01000
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#define TIFM_MS_SYS_INTCLR 0x00800
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#define TIFM_MS_SYS_MSIEN 0x00400
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#define TIFM_MS_SYS_FCLR 0x00200
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#define TIFM_MS_SYS_FDIR 0x00100
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#define TIFM_MS_SYS_DAM 0x00080
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#define TIFM_MS_SYS_DRM 0x00040
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#define TIFM_MS_SYS_DRQSL 0x00020
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#define TIFM_MS_SYS_REI 0x00010
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#define TIFM_MS_SYS_REO 0x00008
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#define TIFM_MS_SYS_BSY_MASK 0x00007
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#define TIFM_MS_SYS_FIFO (TIFM_MS_SYS_INTEN | TIFM_MS_SYS_MSIEN \
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| TIFM_MS_SYS_FCLR | TIFM_MS_SYS_BSY_MASK)
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/* Hardware flags */
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enum {
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CMD_READY = 0x01,
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FIFO_READY = 0x02,
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CARD_INT = 0x04
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};
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struct tifm_ms {
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struct tifm_dev *dev;
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struct timer_list timer;
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struct memstick_request *req;
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struct tasklet_struct notify;
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unsigned int mode_mask;
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unsigned int block_pos;
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unsigned long timeout_jiffies;
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unsigned char eject:1,
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use_dma:1;
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unsigned char cmd_flags;
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unsigned char io_pos;
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unsigned int io_word;
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};
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static unsigned int tifm_ms_read_data(struct tifm_ms *host,
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unsigned char *buf, unsigned int length)
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{
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struct tifm_dev *sock = host->dev;
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unsigned int off = 0;
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while (host->io_pos && length) {
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buf[off++] = host->io_word & 0xff;
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host->io_word >>= 8;
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length--;
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host->io_pos--;
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}
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if (!length)
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return off;
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while (!(TIFM_MS_STAT_EMP & readl(sock->addr + SOCK_MS_STATUS))) {
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if (length < 4)
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break;
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*(unsigned int *)(buf + off) = __raw_readl(sock->addr
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+ SOCK_MS_DATA);
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length -= 4;
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off += 4;
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}
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if (length
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&& !(TIFM_MS_STAT_EMP & readl(sock->addr + SOCK_MS_STATUS))) {
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host->io_word = readl(sock->addr + SOCK_MS_DATA);
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for (host->io_pos = 4; host->io_pos; --host->io_pos) {
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buf[off++] = host->io_word & 0xff;
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host->io_word >>= 8;
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length--;
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if (!length)
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break;
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}
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}
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return off;
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}
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static unsigned int tifm_ms_write_data(struct tifm_ms *host,
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unsigned char *buf, unsigned int length)
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{
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struct tifm_dev *sock = host->dev;
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unsigned int off = 0;
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if (host->io_pos) {
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while (host->io_pos < 4 && length) {
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host->io_word |= buf[off++] << (host->io_pos * 8);
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host->io_pos++;
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length--;
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}
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}
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if (host->io_pos == 4
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&& !(TIFM_MS_STAT_FUL & readl(sock->addr + SOCK_MS_STATUS))) {
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writel(TIFM_MS_SYS_FDIR | readl(sock->addr + SOCK_MS_SYSTEM),
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sock->addr + SOCK_MS_SYSTEM);
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writel(host->io_word, sock->addr + SOCK_MS_DATA);
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host->io_pos = 0;
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host->io_word = 0;
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} else if (host->io_pos) {
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return off;
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}
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if (!length)
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return off;
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while (!(TIFM_MS_STAT_FUL & readl(sock->addr + SOCK_MS_STATUS))) {
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if (length < 4)
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break;
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writel(TIFM_MS_SYS_FDIR | readl(sock->addr + SOCK_MS_SYSTEM),
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sock->addr + SOCK_MS_SYSTEM);
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__raw_writel(*(unsigned int *)(buf + off),
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sock->addr + SOCK_MS_DATA);
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length -= 4;
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off += 4;
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}
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switch (length) {
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case 3:
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host->io_word |= buf[off + 2] << 16;
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host->io_pos++;
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case 2:
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host->io_word |= buf[off + 1] << 8;
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host->io_pos++;
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case 1:
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host->io_word |= buf[off];
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host->io_pos++;
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}
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off += host->io_pos;
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return off;
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}
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static unsigned int tifm_ms_transfer_data(struct tifm_ms *host)
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{
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struct tifm_dev *sock = host->dev;
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unsigned int length;
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unsigned int off;
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unsigned int t_size, p_cnt;
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unsigned char *buf;
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struct page *pg;
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unsigned long flags = 0;
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if (host->req->long_data) {
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length = host->req->sg.length - host->block_pos;
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off = host->req->sg.offset + host->block_pos;
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} else {
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length = host->req->data_len - host->block_pos;
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off = 0;
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}
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dev_dbg(&sock->dev, "fifo data transfer, %d, %d\n", length,
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host->block_pos);
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while (length) {
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unsigned int uninitialized_var(p_off);
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if (host->req->long_data) {
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pg = nth_page(sg_page(&host->req->sg),
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off >> PAGE_SHIFT);
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p_off = offset_in_page(off);
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p_cnt = PAGE_SIZE - p_off;
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p_cnt = min(p_cnt, length);
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local_irq_save(flags);
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buf = kmap_atomic(pg) + p_off;
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} else {
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buf = host->req->data + host->block_pos;
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p_cnt = host->req->data_len - host->block_pos;
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}
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t_size = host->req->data_dir == WRITE
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? tifm_ms_write_data(host, buf, p_cnt)
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: tifm_ms_read_data(host, buf, p_cnt);
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if (host->req->long_data) {
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kunmap_atomic(buf - p_off);
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local_irq_restore(flags);
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}
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if (!t_size)
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break;
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host->block_pos += t_size;
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length -= t_size;
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off += t_size;
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}
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dev_dbg(&sock->dev, "fifo data transfer, %d remaining\n", length);
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if (!length && (host->req->data_dir == WRITE)) {
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if (host->io_pos) {
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writel(TIFM_MS_SYS_FDIR
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| readl(sock->addr + SOCK_MS_SYSTEM),
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sock->addr + SOCK_MS_SYSTEM);
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writel(host->io_word, sock->addr + SOCK_MS_DATA);
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}
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writel(TIFM_MS_SYS_FDIR
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| readl(sock->addr + SOCK_MS_SYSTEM),
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sock->addr + SOCK_MS_SYSTEM);
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writel(0, sock->addr + SOCK_MS_DATA);
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} else {
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readl(sock->addr + SOCK_MS_DATA);
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}
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return length;
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}
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static int tifm_ms_issue_cmd(struct tifm_ms *host)
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{
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struct tifm_dev *sock = host->dev;
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unsigned char *data;
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unsigned int data_len, cmd, sys_param;
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host->cmd_flags = 0;
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host->block_pos = 0;
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host->io_pos = 0;
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host->io_word = 0;
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host->cmd_flags = 0;
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data = host->req->data;
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host->use_dma = !no_dma;
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if (host->req->long_data) {
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data_len = host->req->sg.length;
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if (!is_power_of_2(data_len))
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host->use_dma = 0;
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} else {
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data_len = host->req->data_len;
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host->use_dma = 0;
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}
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writel(TIFM_FIFO_INT_SETALL,
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sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
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writel(TIFM_FIFO_ENABLE,
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sock->addr + SOCK_FIFO_CONTROL);
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if (host->use_dma) {
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if (1 != tifm_map_sg(sock, &host->req->sg, 1,
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host->req->data_dir == READ
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? PCI_DMA_FROMDEVICE
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: PCI_DMA_TODEVICE)) {
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host->req->error = -ENOMEM;
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return host->req->error;
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}
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data_len = sg_dma_len(&host->req->sg);
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writel(ilog2(data_len) - 2,
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sock->addr + SOCK_FIFO_PAGE_SIZE);
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writel(TIFM_FIFO_INTMASK,
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sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
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sys_param = TIFM_DMA_EN | (1 << 8);
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if (host->req->data_dir == WRITE)
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sys_param |= TIFM_DMA_TX;
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writel(TIFM_FIFO_INTMASK,
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sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
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writel(sg_dma_address(&host->req->sg),
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sock->addr + SOCK_DMA_ADDRESS);
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writel(sys_param, sock->addr + SOCK_DMA_CONTROL);
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} else {
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writel(host->mode_mask | TIFM_MS_SYS_FIFO,
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sock->addr + SOCK_MS_SYSTEM);
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writel(TIFM_FIFO_MORE,
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sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
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}
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mod_timer(&host->timer, jiffies + host->timeout_jiffies);
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writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL),
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sock->addr + SOCK_CONTROL);
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host->req->error = 0;
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sys_param = readl(sock->addr + SOCK_MS_SYSTEM);
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sys_param |= TIFM_MS_SYS_INTCLR;
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if (host->use_dma)
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sys_param |= TIFM_MS_SYS_DMA;
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else
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sys_param &= ~TIFM_MS_SYS_DMA;
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writel(sys_param, sock->addr + SOCK_MS_SYSTEM);
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cmd = (host->req->tpc & 0xf) << 12;
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cmd |= data_len;
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writel(cmd, sock->addr + SOCK_MS_COMMAND);
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dev_dbg(&sock->dev, "executing TPC %x, %x\n", cmd, sys_param);
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return 0;
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}
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static void tifm_ms_complete_cmd(struct tifm_ms *host)
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{
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struct tifm_dev *sock = host->dev;
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struct memstick_host *msh = tifm_get_drvdata(sock);
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int rc;
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del_timer(&host->timer);
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host->req->int_reg = readl(sock->addr + SOCK_MS_STATUS) & 0xff;
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host->req->int_reg = (host->req->int_reg & 1)
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| ((host->req->int_reg << 4) & 0xe0);
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writel(TIFM_FIFO_INT_SETALL,
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sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
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writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL);
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if (host->use_dma) {
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tifm_unmap_sg(sock, &host->req->sg, 1,
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host->req->data_dir == READ
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? PCI_DMA_FROMDEVICE
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: PCI_DMA_TODEVICE);
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}
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writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL),
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sock->addr + SOCK_CONTROL);
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dev_dbg(&sock->dev, "TPC complete\n");
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do {
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rc = memstick_next_req(msh, &host->req);
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} while (!rc && tifm_ms_issue_cmd(host));
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}
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static int tifm_ms_check_status(struct tifm_ms *host)
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{
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if (!host->req->error) {
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if (!(host->cmd_flags & CMD_READY))
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return 1;
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if (!(host->cmd_flags & FIFO_READY))
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return 1;
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if (host->req->need_card_int
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&& !(host->cmd_flags & CARD_INT))
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return 1;
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}
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return 0;
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}
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/* Called from interrupt handler */
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static void tifm_ms_data_event(struct tifm_dev *sock)
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{
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struct tifm_ms *host;
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unsigned int fifo_status = 0, host_status = 0;
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int rc = 1;
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spin_lock(&sock->lock);
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host = memstick_priv((struct memstick_host *)tifm_get_drvdata(sock));
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fifo_status = readl(sock->addr + SOCK_DMA_FIFO_STATUS);
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host_status = readl(sock->addr + SOCK_MS_STATUS);
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dev_dbg(&sock->dev,
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"data event: fifo_status %x, host_status %x, flags %x\n",
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fifo_status, host_status, host->cmd_flags);
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if (host->req) {
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if (host->use_dma && (fifo_status & 1)) {
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host->cmd_flags |= FIFO_READY;
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rc = tifm_ms_check_status(host);
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}
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if (!host->use_dma && (fifo_status & TIFM_FIFO_MORE)) {
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if (!tifm_ms_transfer_data(host)) {
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host->cmd_flags |= FIFO_READY;
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rc = tifm_ms_check_status(host);
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}
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}
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}
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writel(fifo_status, sock->addr + SOCK_DMA_FIFO_STATUS);
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if (!rc)
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tifm_ms_complete_cmd(host);
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spin_unlock(&sock->lock);
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}
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/* Called from interrupt handler */
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static void tifm_ms_card_event(struct tifm_dev *sock)
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{
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struct tifm_ms *host;
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unsigned int host_status = 0;
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int rc = 1;
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spin_lock(&sock->lock);
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host = memstick_priv((struct memstick_host *)tifm_get_drvdata(sock));
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host_status = readl(sock->addr + SOCK_MS_STATUS);
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dev_dbg(&sock->dev, "host event: host_status %x, flags %x\n",
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host_status, host->cmd_flags);
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if (host->req) {
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if (host_status & TIFM_MS_STAT_TOE)
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host->req->error = -ETIME;
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else if (host_status & TIFM_MS_STAT_CRC)
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host->req->error = -EILSEQ;
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if (host_status & TIFM_MS_STAT_RDY)
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host->cmd_flags |= CMD_READY;
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if (host_status & TIFM_MS_STAT_MSINT)
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host->cmd_flags |= CARD_INT;
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rc = tifm_ms_check_status(host);
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}
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writel(TIFM_MS_SYS_INTCLR | readl(sock->addr + SOCK_MS_SYSTEM),
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sock->addr + SOCK_MS_SYSTEM);
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if (!rc)
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tifm_ms_complete_cmd(host);
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spin_unlock(&sock->lock);
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return;
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}
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static void tifm_ms_req_tasklet(unsigned long data)
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{
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struct memstick_host *msh = (struct memstick_host *)data;
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struct tifm_ms *host = memstick_priv(msh);
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struct tifm_dev *sock = host->dev;
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unsigned long flags;
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int rc;
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spin_lock_irqsave(&sock->lock, flags);
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if (!host->req) {
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if (host->eject) {
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do {
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rc = memstick_next_req(msh, &host->req);
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if (!rc)
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host->req->error = -ETIME;
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} while (!rc);
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spin_unlock_irqrestore(&sock->lock, flags);
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return;
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}
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do {
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rc = memstick_next_req(msh, &host->req);
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} while (!rc && tifm_ms_issue_cmd(host));
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}
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spin_unlock_irqrestore(&sock->lock, flags);
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}
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static void tifm_ms_dummy_submit(struct memstick_host *msh)
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{
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return;
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}
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static void tifm_ms_submit_req(struct memstick_host *msh)
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{
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struct tifm_ms *host = memstick_priv(msh);
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tasklet_schedule(&host->notify);
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}
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static int tifm_ms_set_param(struct memstick_host *msh,
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enum memstick_param param,
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int value)
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{
|
|
struct tifm_ms *host = memstick_priv(msh);
|
|
struct tifm_dev *sock = host->dev;
|
|
|
|
switch (param) {
|
|
case MEMSTICK_POWER:
|
|
/* also affected by media detection mechanism */
|
|
if (value == MEMSTICK_POWER_ON) {
|
|
host->mode_mask = TIFM_MS_SYS_SRAC | TIFM_MS_SYS_REI;
|
|
writel(TIFM_MS_SYS_RESET, sock->addr + SOCK_MS_SYSTEM);
|
|
writel(TIFM_MS_SYS_FCLR | TIFM_MS_SYS_INTCLR,
|
|
sock->addr + SOCK_MS_SYSTEM);
|
|
writel(0xffffffff, sock->addr + SOCK_MS_STATUS);
|
|
} else if (value == MEMSTICK_POWER_OFF) {
|
|
writel(TIFM_MS_SYS_FCLR | TIFM_MS_SYS_INTCLR,
|
|
sock->addr + SOCK_MS_SYSTEM);
|
|
writel(0xffffffff, sock->addr + SOCK_MS_STATUS);
|
|
} else
|
|
return -EINVAL;
|
|
break;
|
|
case MEMSTICK_INTERFACE:
|
|
if (value == MEMSTICK_SERIAL) {
|
|
host->mode_mask = TIFM_MS_SYS_SRAC | TIFM_MS_SYS_REI;
|
|
writel((~TIFM_CTRL_FAST_CLK)
|
|
& readl(sock->addr + SOCK_CONTROL),
|
|
sock->addr + SOCK_CONTROL);
|
|
} else if (value == MEMSTICK_PAR4) {
|
|
host->mode_mask = 0;
|
|
writel(TIFM_CTRL_FAST_CLK
|
|
| readl(sock->addr + SOCK_CONTROL),
|
|
sock->addr + SOCK_CONTROL);
|
|
} else
|
|
return -EINVAL;
|
|
break;
|
|
};
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void tifm_ms_abort(unsigned long data)
|
|
{
|
|
struct tifm_ms *host = (struct tifm_ms *)data;
|
|
|
|
dev_dbg(&host->dev->dev, "status %x\n",
|
|
readl(host->dev->addr + SOCK_MS_STATUS));
|
|
printk(KERN_ERR
|
|
"%s : card failed to respond for a long period of time "
|
|
"(%x, %x)\n",
|
|
dev_name(&host->dev->dev), host->req ? host->req->tpc : 0,
|
|
host->cmd_flags);
|
|
|
|
tifm_eject(host->dev);
|
|
}
|
|
|
|
static int tifm_ms_probe(struct tifm_dev *sock)
|
|
{
|
|
struct memstick_host *msh;
|
|
struct tifm_ms *host;
|
|
int rc = -EIO;
|
|
|
|
if (!(TIFM_SOCK_STATE_OCCUPIED
|
|
& readl(sock->addr + SOCK_PRESENT_STATE))) {
|
|
printk(KERN_WARNING "%s : card gone, unexpectedly\n",
|
|
dev_name(&sock->dev));
|
|
return rc;
|
|
}
|
|
|
|
msh = memstick_alloc_host(sizeof(struct tifm_ms), &sock->dev);
|
|
if (!msh)
|
|
return -ENOMEM;
|
|
|
|
host = memstick_priv(msh);
|
|
tifm_set_drvdata(sock, msh);
|
|
host->dev = sock;
|
|
host->timeout_jiffies = msecs_to_jiffies(1000);
|
|
|
|
setup_timer(&host->timer, tifm_ms_abort, (unsigned long)host);
|
|
tasklet_init(&host->notify, tifm_ms_req_tasklet, (unsigned long)msh);
|
|
|
|
msh->request = tifm_ms_submit_req;
|
|
msh->set_param = tifm_ms_set_param;
|
|
sock->card_event = tifm_ms_card_event;
|
|
sock->data_event = tifm_ms_data_event;
|
|
if (tifm_has_ms_pif(sock))
|
|
msh->caps |= MEMSTICK_CAP_PAR4;
|
|
|
|
rc = memstick_add_host(msh);
|
|
if (!rc)
|
|
return 0;
|
|
|
|
memstick_free_host(msh);
|
|
return rc;
|
|
}
|
|
|
|
static void tifm_ms_remove(struct tifm_dev *sock)
|
|
{
|
|
struct memstick_host *msh = tifm_get_drvdata(sock);
|
|
struct tifm_ms *host = memstick_priv(msh);
|
|
int rc = 0;
|
|
unsigned long flags;
|
|
|
|
msh->request = tifm_ms_dummy_submit;
|
|
tasklet_kill(&host->notify);
|
|
spin_lock_irqsave(&sock->lock, flags);
|
|
host->eject = 1;
|
|
if (host->req) {
|
|
del_timer(&host->timer);
|
|
writel(TIFM_FIFO_INT_SETALL,
|
|
sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
|
|
writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL);
|
|
if (host->use_dma)
|
|
tifm_unmap_sg(sock, &host->req->sg, 1,
|
|
host->req->data_dir == READ
|
|
? PCI_DMA_TODEVICE
|
|
: PCI_DMA_FROMDEVICE);
|
|
host->req->error = -ETIME;
|
|
|
|
do {
|
|
rc = memstick_next_req(msh, &host->req);
|
|
if (!rc)
|
|
host->req->error = -ETIME;
|
|
} while (!rc);
|
|
}
|
|
spin_unlock_irqrestore(&sock->lock, flags);
|
|
|
|
memstick_remove_host(msh);
|
|
memstick_free_host(msh);
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
static int tifm_ms_suspend(struct tifm_dev *sock, pm_message_t state)
|
|
{
|
|
struct memstick_host *msh = tifm_get_drvdata(sock);
|
|
|
|
memstick_suspend_host(msh);
|
|
return 0;
|
|
}
|
|
|
|
static int tifm_ms_resume(struct tifm_dev *sock)
|
|
{
|
|
struct memstick_host *msh = tifm_get_drvdata(sock);
|
|
|
|
memstick_resume_host(msh);
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
|
|
#define tifm_ms_suspend NULL
|
|
#define tifm_ms_resume NULL
|
|
|
|
#endif /* CONFIG_PM */
|
|
|
|
static struct tifm_device_id tifm_ms_id_tbl[] = {
|
|
{ TIFM_TYPE_MS }, { 0 }
|
|
};
|
|
|
|
static struct tifm_driver tifm_ms_driver = {
|
|
.driver = {
|
|
.name = DRIVER_NAME,
|
|
.owner = THIS_MODULE
|
|
},
|
|
.id_table = tifm_ms_id_tbl,
|
|
.probe = tifm_ms_probe,
|
|
.remove = tifm_ms_remove,
|
|
.suspend = tifm_ms_suspend,
|
|
.resume = tifm_ms_resume
|
|
};
|
|
|
|
static int __init tifm_ms_init(void)
|
|
{
|
|
return tifm_register_driver(&tifm_ms_driver);
|
|
}
|
|
|
|
static void __exit tifm_ms_exit(void)
|
|
{
|
|
tifm_unregister_driver(&tifm_ms_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Alex Dubov");
|
|
MODULE_DESCRIPTION("TI FlashMedia MemoryStick driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DEVICE_TABLE(tifm, tifm_ms_id_tbl);
|
|
|
|
module_init(tifm_ms_init);
|
|
module_exit(tifm_ms_exit);
|