642 lines
16 KiB
C
642 lines
16 KiB
C
/*
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* OMAP on-chip MMC/SD host emulation.
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*
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* Copyright (C) 2006-2007 Andrzej Zaborowski <balrog@zabor.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 or
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* (at your option) version 3 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "hw.h"
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#include "omap.h"
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#include "sd.h"
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struct omap_mmc_s {
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qemu_irq irq;
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qemu_irq *dma;
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qemu_irq coverswitch;
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MemoryRegion iomem;
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omap_clk clk;
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SDState *card;
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uint16_t last_cmd;
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uint16_t sdio;
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uint16_t rsp[8];
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uint32_t arg;
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int lines;
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int dw;
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int mode;
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int enable;
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int be;
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int rev;
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uint16_t status;
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uint16_t mask;
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uint8_t cto;
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uint16_t dto;
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int clkdiv;
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uint16_t fifo[32];
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int fifo_start;
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int fifo_len;
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uint16_t blen;
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uint16_t blen_counter;
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uint16_t nblk;
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uint16_t nblk_counter;
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int tx_dma;
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int rx_dma;
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int af_level;
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int ae_level;
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int ddir;
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int transfer;
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int cdet_wakeup;
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int cdet_enable;
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int cdet_state;
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qemu_irq cdet;
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};
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static void omap_mmc_interrupts_update(struct omap_mmc_s *s)
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{
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qemu_set_irq(s->irq, !!(s->status & s->mask));
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}
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static void omap_mmc_fifolevel_update(struct omap_mmc_s *host)
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{
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if (!host->transfer && !host->fifo_len) {
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host->status &= 0xf3ff;
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return;
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}
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if (host->fifo_len > host->af_level && host->ddir) {
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if (host->rx_dma) {
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host->status &= 0xfbff;
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qemu_irq_raise(host->dma[1]);
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} else
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host->status |= 0x0400;
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} else {
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host->status &= 0xfbff;
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qemu_irq_lower(host->dma[1]);
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}
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if (host->fifo_len < host->ae_level && !host->ddir) {
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if (host->tx_dma) {
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host->status &= 0xf7ff;
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qemu_irq_raise(host->dma[0]);
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} else
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host->status |= 0x0800;
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} else {
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qemu_irq_lower(host->dma[0]);
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host->status &= 0xf7ff;
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}
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}
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typedef enum {
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sd_nore = 0, /* no response */
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sd_r1, /* normal response command */
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sd_r2, /* CID, CSD registers */
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sd_r3, /* OCR register */
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sd_r6 = 6, /* Published RCA response */
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sd_r1b = -1,
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} sd_rsp_type_t;
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static void omap_mmc_command(struct omap_mmc_s *host, int cmd, int dir,
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sd_cmd_type_t type, int busy, sd_rsp_type_t resptype, int init)
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{
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uint32_t rspstatus, mask;
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int rsplen, timeout;
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SDRequest request;
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uint8_t response[16];
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if (init && cmd == 0) {
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host->status |= 0x0001;
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return;
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}
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if (resptype == sd_r1 && busy)
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resptype = sd_r1b;
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if (type == sd_adtc) {
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host->fifo_start = 0;
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host->fifo_len = 0;
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host->transfer = 1;
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host->ddir = dir;
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} else
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host->transfer = 0;
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timeout = 0;
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mask = 0;
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rspstatus = 0;
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request.cmd = cmd;
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request.arg = host->arg;
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request.crc = 0; /* FIXME */
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rsplen = sd_do_command(host->card, &request, response);
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/* TODO: validate CRCs */
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switch (resptype) {
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case sd_nore:
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rsplen = 0;
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break;
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case sd_r1:
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case sd_r1b:
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if (rsplen < 4) {
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timeout = 1;
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break;
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}
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rsplen = 4;
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mask = OUT_OF_RANGE | ADDRESS_ERROR | BLOCK_LEN_ERROR |
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ERASE_SEQ_ERROR | ERASE_PARAM | WP_VIOLATION |
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LOCK_UNLOCK_FAILED | COM_CRC_ERROR | ILLEGAL_COMMAND |
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CARD_ECC_FAILED | CC_ERROR | SD_ERROR |
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CID_CSD_OVERWRITE;
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if (host->sdio & (1 << 13))
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mask |= AKE_SEQ_ERROR;
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rspstatus = (response[0] << 24) | (response[1] << 16) |
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(response[2] << 8) | (response[3] << 0);
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break;
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case sd_r2:
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if (rsplen < 16) {
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timeout = 1;
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break;
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}
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rsplen = 16;
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break;
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case sd_r3:
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if (rsplen < 4) {
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timeout = 1;
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break;
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}
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rsplen = 4;
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rspstatus = (response[0] << 24) | (response[1] << 16) |
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(response[2] << 8) | (response[3] << 0);
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if (rspstatus & 0x80000000)
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host->status &= 0xe000;
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else
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host->status |= 0x1000;
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break;
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case sd_r6:
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if (rsplen < 4) {
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timeout = 1;
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break;
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}
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rsplen = 4;
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mask = 0xe000 | AKE_SEQ_ERROR;
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rspstatus = (response[2] << 8) | (response[3] << 0);
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}
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if (rspstatus & mask)
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host->status |= 0x4000;
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else
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host->status &= 0xb000;
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if (rsplen)
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for (rsplen = 0; rsplen < 8; rsplen ++)
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host->rsp[~rsplen & 7] = response[(rsplen << 1) | 1] |
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(response[(rsplen << 1) | 0] << 8);
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if (timeout)
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host->status |= 0x0080;
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else if (cmd == 12)
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host->status |= 0x0005; /* Makes it more real */
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else
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host->status |= 0x0001;
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}
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static void omap_mmc_transfer(struct omap_mmc_s *host)
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{
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uint8_t value;
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if (!host->transfer)
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return;
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while (1) {
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if (host->ddir) {
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if (host->fifo_len > host->af_level)
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break;
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value = sd_read_data(host->card);
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host->fifo[(host->fifo_start + host->fifo_len) & 31] = value;
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if (-- host->blen_counter) {
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value = sd_read_data(host->card);
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host->fifo[(host->fifo_start + host->fifo_len) & 31] |=
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value << 8;
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host->blen_counter --;
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}
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host->fifo_len ++;
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} else {
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if (!host->fifo_len)
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break;
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value = host->fifo[host->fifo_start] & 0xff;
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sd_write_data(host->card, value);
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if (-- host->blen_counter) {
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value = host->fifo[host->fifo_start] >> 8;
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sd_write_data(host->card, value);
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host->blen_counter --;
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}
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host->fifo_start ++;
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host->fifo_len --;
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host->fifo_start &= 31;
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}
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if (host->blen_counter == 0) {
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host->nblk_counter --;
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host->blen_counter = host->blen;
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if (host->nblk_counter == 0) {
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host->nblk_counter = host->nblk;
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host->transfer = 0;
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host->status |= 0x0008;
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break;
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}
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}
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}
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}
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static void omap_mmc_update(void *opaque)
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{
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struct omap_mmc_s *s = opaque;
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omap_mmc_transfer(s);
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omap_mmc_fifolevel_update(s);
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omap_mmc_interrupts_update(s);
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}
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void omap_mmc_reset(struct omap_mmc_s *host)
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{
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host->last_cmd = 0;
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memset(host->rsp, 0, sizeof(host->rsp));
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host->arg = 0;
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host->dw = 0;
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host->mode = 0;
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host->enable = 0;
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host->status = 0;
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host->mask = 0;
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host->cto = 0;
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host->dto = 0;
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host->fifo_len = 0;
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host->blen = 0;
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host->blen_counter = 0;
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host->nblk = 0;
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host->nblk_counter = 0;
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host->tx_dma = 0;
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host->rx_dma = 0;
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host->ae_level = 0x00;
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host->af_level = 0x1f;
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host->transfer = 0;
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host->cdet_wakeup = 0;
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host->cdet_enable = 0;
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qemu_set_irq(host->coverswitch, host->cdet_state);
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host->clkdiv = 0;
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}
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static uint64_t omap_mmc_read(void *opaque, target_phys_addr_t offset,
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unsigned size)
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{
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uint16_t i;
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struct omap_mmc_s *s = (struct omap_mmc_s *) opaque;
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if (size != 2) {
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return omap_badwidth_read16(opaque, offset);
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}
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switch (offset) {
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case 0x00: /* MMC_CMD */
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return s->last_cmd;
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case 0x04: /* MMC_ARGL */
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return s->arg & 0x0000ffff;
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case 0x08: /* MMC_ARGH */
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return s->arg >> 16;
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case 0x0c: /* MMC_CON */
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return (s->dw << 15) | (s->mode << 12) | (s->enable << 11) |
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(s->be << 10) | s->clkdiv;
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case 0x10: /* MMC_STAT */
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return s->status;
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case 0x14: /* MMC_IE */
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return s->mask;
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case 0x18: /* MMC_CTO */
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return s->cto;
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case 0x1c: /* MMC_DTO */
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return s->dto;
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case 0x20: /* MMC_DATA */
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/* TODO: support 8-bit access */
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i = s->fifo[s->fifo_start];
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if (s->fifo_len == 0) {
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printf("MMC: FIFO underrun\n");
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return i;
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}
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s->fifo_start ++;
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s->fifo_len --;
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s->fifo_start &= 31;
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omap_mmc_transfer(s);
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omap_mmc_fifolevel_update(s);
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omap_mmc_interrupts_update(s);
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return i;
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case 0x24: /* MMC_BLEN */
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return s->blen_counter;
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case 0x28: /* MMC_NBLK */
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return s->nblk_counter;
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case 0x2c: /* MMC_BUF */
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return (s->rx_dma << 15) | (s->af_level << 8) |
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(s->tx_dma << 7) | s->ae_level;
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case 0x30: /* MMC_SPI */
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return 0x0000;
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case 0x34: /* MMC_SDIO */
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return (s->cdet_wakeup << 2) | (s->cdet_enable) | s->sdio;
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case 0x38: /* MMC_SYST */
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return 0x0000;
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case 0x3c: /* MMC_REV */
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return s->rev;
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case 0x40: /* MMC_RSP0 */
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case 0x44: /* MMC_RSP1 */
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case 0x48: /* MMC_RSP2 */
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case 0x4c: /* MMC_RSP3 */
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case 0x50: /* MMC_RSP4 */
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case 0x54: /* MMC_RSP5 */
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case 0x58: /* MMC_RSP6 */
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case 0x5c: /* MMC_RSP7 */
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return s->rsp[(offset - 0x40) >> 2];
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/* OMAP2-specific */
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case 0x60: /* MMC_IOSR */
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case 0x64: /* MMC_SYSC */
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return 0;
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case 0x68: /* MMC_SYSS */
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return 1; /* RSTD */
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}
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OMAP_BAD_REG(offset);
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return 0;
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}
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static void omap_mmc_write(void *opaque, target_phys_addr_t offset,
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uint64_t value, unsigned size)
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{
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int i;
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struct omap_mmc_s *s = (struct omap_mmc_s *) opaque;
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if (size != 2) {
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return omap_badwidth_write16(opaque, offset, value);
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}
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switch (offset) {
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case 0x00: /* MMC_CMD */
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if (!s->enable)
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break;
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s->last_cmd = value;
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for (i = 0; i < 8; i ++)
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s->rsp[i] = 0x0000;
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omap_mmc_command(s, value & 63, (value >> 15) & 1,
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(sd_cmd_type_t) ((value >> 12) & 3),
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(value >> 11) & 1,
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(sd_rsp_type_t) ((value >> 8) & 7),
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(value >> 7) & 1);
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omap_mmc_update(s);
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break;
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case 0x04: /* MMC_ARGL */
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s->arg &= 0xffff0000;
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s->arg |= 0x0000ffff & value;
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break;
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case 0x08: /* MMC_ARGH */
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s->arg &= 0x0000ffff;
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s->arg |= value << 16;
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break;
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case 0x0c: /* MMC_CON */
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s->dw = (value >> 15) & 1;
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s->mode = (value >> 12) & 3;
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s->enable = (value >> 11) & 1;
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s->be = (value >> 10) & 1;
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s->clkdiv = (value >> 0) & (s->rev >= 2 ? 0x3ff : 0xff);
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if (s->mode != 0)
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printf("SD mode %i unimplemented!\n", s->mode);
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if (s->be != 0)
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printf("SD FIFO byte sex unimplemented!\n");
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if (s->dw != 0 && s->lines < 4)
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printf("4-bit SD bus enabled\n");
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if (!s->enable)
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omap_mmc_reset(s);
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break;
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case 0x10: /* MMC_STAT */
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s->status &= ~value;
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omap_mmc_interrupts_update(s);
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break;
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case 0x14: /* MMC_IE */
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s->mask = value & 0x7fff;
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omap_mmc_interrupts_update(s);
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break;
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case 0x18: /* MMC_CTO */
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s->cto = value & 0xff;
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if (s->cto > 0xfd && s->rev <= 1)
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printf("MMC: CTO of 0xff and 0xfe cannot be used!\n");
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break;
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case 0x1c: /* MMC_DTO */
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s->dto = value & 0xffff;
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break;
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case 0x20: /* MMC_DATA */
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/* TODO: support 8-bit access */
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if (s->fifo_len == 32)
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break;
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s->fifo[(s->fifo_start + s->fifo_len) & 31] = value;
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s->fifo_len ++;
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omap_mmc_transfer(s);
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omap_mmc_fifolevel_update(s);
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omap_mmc_interrupts_update(s);
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break;
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case 0x24: /* MMC_BLEN */
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s->blen = (value & 0x07ff) + 1;
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s->blen_counter = s->blen;
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break;
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case 0x28: /* MMC_NBLK */
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s->nblk = (value & 0x07ff) + 1;
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s->nblk_counter = s->nblk;
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s->blen_counter = s->blen;
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break;
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case 0x2c: /* MMC_BUF */
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s->rx_dma = (value >> 15) & 1;
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s->af_level = (value >> 8) & 0x1f;
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s->tx_dma = (value >> 7) & 1;
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s->ae_level = value & 0x1f;
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if (s->rx_dma)
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s->status &= 0xfbff;
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if (s->tx_dma)
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s->status &= 0xf7ff;
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omap_mmc_fifolevel_update(s);
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omap_mmc_interrupts_update(s);
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break;
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/* SPI, SDIO and TEST modes unimplemented */
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case 0x30: /* MMC_SPI (OMAP1 only) */
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break;
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case 0x34: /* MMC_SDIO */
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s->sdio = value & (s->rev >= 2 ? 0xfbf3 : 0x2020);
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s->cdet_wakeup = (value >> 9) & 1;
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s->cdet_enable = (value >> 2) & 1;
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break;
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case 0x38: /* MMC_SYST */
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break;
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case 0x3c: /* MMC_REV */
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case 0x40: /* MMC_RSP0 */
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case 0x44: /* MMC_RSP1 */
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case 0x48: /* MMC_RSP2 */
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case 0x4c: /* MMC_RSP3 */
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case 0x50: /* MMC_RSP4 */
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case 0x54: /* MMC_RSP5 */
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case 0x58: /* MMC_RSP6 */
|
|
case 0x5c: /* MMC_RSP7 */
|
|
OMAP_RO_REG(offset);
|
|
break;
|
|
|
|
/* OMAP2-specific */
|
|
case 0x60: /* MMC_IOSR */
|
|
if (value & 0xf)
|
|
printf("MMC: SDIO bits used!\n");
|
|
break;
|
|
case 0x64: /* MMC_SYSC */
|
|
if (value & (1 << 2)) /* SRTS */
|
|
omap_mmc_reset(s);
|
|
break;
|
|
case 0x68: /* MMC_SYSS */
|
|
OMAP_RO_REG(offset);
|
|
break;
|
|
|
|
default:
|
|
OMAP_BAD_REG(offset);
|
|
}
|
|
}
|
|
|
|
static const MemoryRegionOps omap_mmc_ops = {
|
|
.read = omap_mmc_read,
|
|
.write = omap_mmc_write,
|
|
.endianness = DEVICE_NATIVE_ENDIAN,
|
|
};
|
|
|
|
static void omap_mmc_cover_cb(void *opaque, int line, int level)
|
|
{
|
|
struct omap_mmc_s *host = (struct omap_mmc_s *) opaque;
|
|
|
|
if (!host->cdet_state && level) {
|
|
host->status |= 0x0002;
|
|
omap_mmc_interrupts_update(host);
|
|
if (host->cdet_wakeup) {
|
|
/* TODO: Assert wake-up */
|
|
}
|
|
}
|
|
|
|
if (host->cdet_state != level) {
|
|
qemu_set_irq(host->coverswitch, level);
|
|
host->cdet_state = level;
|
|
}
|
|
}
|
|
|
|
struct omap_mmc_s *omap_mmc_init(target_phys_addr_t base,
|
|
MemoryRegion *sysmem,
|
|
BlockDriverState *bd,
|
|
qemu_irq irq, qemu_irq dma[], omap_clk clk)
|
|
{
|
|
struct omap_mmc_s *s = (struct omap_mmc_s *)
|
|
g_malloc0(sizeof(struct omap_mmc_s));
|
|
|
|
s->irq = irq;
|
|
s->dma = dma;
|
|
s->clk = clk;
|
|
s->lines = 1; /* TODO: needs to be settable per-board */
|
|
s->rev = 1;
|
|
|
|
omap_mmc_reset(s);
|
|
|
|
memory_region_init_io(&s->iomem, &omap_mmc_ops, s, "omap.mmc", 0x800);
|
|
memory_region_add_subregion(sysmem, base, &s->iomem);
|
|
|
|
/* Instantiate the storage */
|
|
s->card = sd_init(bd, 0);
|
|
|
|
return s;
|
|
}
|
|
|
|
struct omap_mmc_s *omap2_mmc_init(struct omap_target_agent_s *ta,
|
|
BlockDriverState *bd, qemu_irq irq, qemu_irq dma[],
|
|
omap_clk fclk, omap_clk iclk)
|
|
{
|
|
struct omap_mmc_s *s = (struct omap_mmc_s *)
|
|
g_malloc0(sizeof(struct omap_mmc_s));
|
|
|
|
s->irq = irq;
|
|
s->dma = dma;
|
|
s->clk = fclk;
|
|
s->lines = 4;
|
|
s->rev = 2;
|
|
|
|
omap_mmc_reset(s);
|
|
|
|
memory_region_init_io(&s->iomem, &omap_mmc_ops, s, "omap.mmc",
|
|
omap_l4_region_size(ta, 0));
|
|
omap_l4_attach_region(ta, 0, &s->iomem);
|
|
|
|
/* Instantiate the storage */
|
|
s->card = sd_init(bd, 0);
|
|
|
|
s->cdet = qemu_allocate_irqs(omap_mmc_cover_cb, s, 1)[0];
|
|
sd_set_cb(s->card, NULL, s->cdet);
|
|
|
|
return s;
|
|
}
|
|
|
|
void omap_mmc_handlers(struct omap_mmc_s *s, qemu_irq ro, qemu_irq cover)
|
|
{
|
|
if (s->cdet) {
|
|
sd_set_cb(s->card, ro, s->cdet);
|
|
s->coverswitch = cover;
|
|
qemu_set_irq(cover, s->cdet_state);
|
|
} else
|
|
sd_set_cb(s->card, ro, cover);
|
|
}
|
|
|
|
void omap_mmc_enable(struct omap_mmc_s *s, int enable)
|
|
{
|
|
sd_enable(s->card, enable);
|
|
}
|