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683 lines
16 KiB
683 lines
16 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* TI FlashMedia driver |
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* |
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* Copyright (C) 2007 Alex Dubov <[email protected]> |
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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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|
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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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/* |
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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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|
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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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fallthrough; |
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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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fallthrough; |
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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 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 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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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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? DMA_FROM_DEVICE |
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: DMA_TO_DEVICE)) { |
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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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? DMA_FROM_DEVICE |
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: DMA_TO_DEVICE); |
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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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{ |
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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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|
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switch (param) { |
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case MEMSTICK_POWER: |
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/* also affected by media detection mechanism */ |
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if (value == MEMSTICK_POWER_ON) { |
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host->mode_mask = TIFM_MS_SYS_SRAC | TIFM_MS_SYS_REI; |
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writel(TIFM_MS_SYS_RESET, sock->addr + SOCK_MS_SYSTEM); |
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writel(TIFM_MS_SYS_FCLR | TIFM_MS_SYS_INTCLR, |
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sock->addr + SOCK_MS_SYSTEM); |
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writel(0xffffffff, sock->addr + SOCK_MS_STATUS); |
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} else if (value == MEMSTICK_POWER_OFF) { |
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writel(TIFM_MS_SYS_FCLR | TIFM_MS_SYS_INTCLR, |
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sock->addr + SOCK_MS_SYSTEM); |
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writel(0xffffffff, sock->addr + SOCK_MS_STATUS); |
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} else |
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return -EINVAL; |
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break; |
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case MEMSTICK_INTERFACE: |
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if (value == MEMSTICK_SERIAL) { |
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host->mode_mask = TIFM_MS_SYS_SRAC | TIFM_MS_SYS_REI; |
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writel((~TIFM_CTRL_FAST_CLK) |
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& readl(sock->addr + SOCK_CONTROL), |
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sock->addr + SOCK_CONTROL); |
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} else if (value == MEMSTICK_PAR4) { |
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host->mode_mask = 0; |
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writel(TIFM_CTRL_FAST_CLK |
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| readl(sock->addr + SOCK_CONTROL), |
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sock->addr + SOCK_CONTROL); |
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} else |
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return -EINVAL; |
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break; |
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} |
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|
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return 0; |
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} |
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|
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static void tifm_ms_abort(struct timer_list *t) |
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{ |
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struct tifm_ms *host = from_timer(host, t, timer); |
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|
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dev_dbg(&host->dev->dev, "status %x\n", |
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readl(host->dev->addr + SOCK_MS_STATUS)); |
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printk(KERN_ERR |
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"%s : card failed to respond for a long period of time " |
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"(%x, %x)\n", |
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dev_name(&host->dev->dev), host->req ? host->req->tpc : 0, |
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host->cmd_flags); |
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|
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tifm_eject(host->dev); |
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} |
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|
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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); |
|
|
|
timer_setup(&host->timer, tifm_ms_abort, 0); |
|
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 |
|
? DMA_TO_DEVICE |
|
: DMA_FROM_DEVICE); |
|
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);
|
|
|