Add OMAP MMC/SD host controller.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3097 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 531 insertions, 0 deletions

diff --git a/hw/omap_mmc.c b/hw/omap_mmc.c
new file mode 100644
index 0000000000..aa77660f28
--- /dev/null
+++ b/hw/omap_mmc.c
@@ -0,0 +1,531 @@
+/*
+ * OMAP on-chip MMC/SD host emulation.
+ *
+ * Copyright (C) 2006-2007 Andrzej Zaborowski  <balrog@zabor.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include "vl.h"
+#include "sd.h"
+
+struct omap_mmc_s {
+    target_phys_addr_t base;
+    qemu_irq irq;
+    qemu_irq *dma;
+    omap_clk clk;
+    SDState *card;
+    uint16_t last_cmd;
+    uint16_t sdio;
+    uint16_t rsp[8];
+    uint32_t arg;
+    int dw;
+    int mode;
+    int enable;
+    uint16_t status;
+    uint16_t mask;
+    uint8_t cto;
+    uint16_t dto;
+    uint16_t fifo[32];
+    int fifo_start;
+    int fifo_len;
+    uint16_t blen;
+    uint16_t blen_counter;
+    uint16_t nblk;
+    uint16_t nblk_counter;
+    int tx_dma;
+    int rx_dma;
+    int af_level;
+    int ae_level;
+
+    int ddir;
+    int transfer;
+};
+
+static void omap_mmc_interrupts_update(struct omap_mmc_s *s)
+{
+    qemu_set_irq(s->irq, !!(s->status & s->mask));
+}
+
+static void omap_mmc_fifolevel_update(struct omap_mmc_s *host)
+{
+    if (!host->transfer && !host->fifo_len) {
+        host->status &= 0xf3ff;
+        return;
+    }
+
+    if (host->fifo_len > host->af_level && host->ddir) {
+        if (host->rx_dma) {
+            host->status &= 0xfbff;
+            qemu_irq_raise(host->dma[1]);
+        } else
+            host->status |= 0x0400;
+    } else {
+        host->status &= 0xfbff;
+        qemu_irq_lower(host->dma[1]);
+    }
+
+    if (host->fifo_len < host->ae_level && !host->ddir) {
+        if (host->tx_dma) {
+            host->status &= 0xf7ff;
+            qemu_irq_raise(host->dma[0]);
+        } else
+            host->status |= 0x0800;
+    } else {
+        qemu_irq_lower(host->dma[0]);
+        host->status &= 0xf7ff;
+    }
+}
+
+typedef enum {
+    sd_nore = 0,	/* no response */
+    sd_r1,		/* normal response command */
+    sd_r2,		/* CID, CSD registers */
+    sd_r3,		/* OCR register */
+    sd_r6 = 6,		/* Published RCA response */
+    sd_r1b = -1,
+} sd_rsp_type_t;
+
+static void omap_mmc_command(struct omap_mmc_s *host, int cmd, int dir,
+                sd_cmd_type_t type, int busy, sd_rsp_type_t resptype, int init)
+{
+    uint32_t rspstatus, mask;
+    int rsplen, timeout;
+    struct sd_request_s request;
+    uint8_t response[16];
+
+    if (resptype == sd_r1 && busy)
+        resptype = sd_r1b;
+
+    if (type == sd_adtc) {
+        host->fifo_start = 0;
+        host->fifo_len = 0;
+        host->transfer = 1;
+        host->ddir = dir;
+    } else
+        host->transfer = 0;
+    timeout = 0;
+    mask = 0;
+    rspstatus = 0;
+
+    request.cmd = cmd;
+    request.arg = host->arg;
+    request.crc = 0; /* FIXME */
+
+    rsplen = sd_do_command(host->card, &request, response);
+
+    /* TODO: validate CRCs */
+    switch (resptype) {
+    case sd_nore:
+        rsplen = 0;
+        break;
+
+    case sd_r1:
+    case sd_r1b:
+        if (rsplen < 4) {
+            timeout = 1;
+            break;
+        }
+        rsplen = 4;
+
+        mask = OUT_OF_RANGE | ADDRESS_ERROR | BLOCK_LEN_ERROR |
+                ERASE_SEQ_ERROR | ERASE_PARAM | WP_VIOLATION |
+                LOCK_UNLOCK_FAILED | COM_CRC_ERROR | ILLEGAL_COMMAND |
+                CARD_ECC_FAILED | CC_ERROR | SD_ERROR |
+                CID_CSD_OVERWRITE;
+        if (host->sdio & (1 << 13))
+            mask |= AKE_SEQ_ERROR;
+        rspstatus = (response[0] << 24) | (response[1] << 16) |
+                (response[2] << 8) | (response[3] << 0);
+        break;
+
+    case sd_r2:
+        if (rsplen < 16) {
+            timeout = 1;
+            break;
+        }
+        rsplen = 16;
+        break;
+
+    case sd_r3:
+        if (rsplen < 4) {
+            timeout = 1;
+            break;
+        }
+        rsplen = 4;
+
+        rspstatus = (response[0] << 24) | (response[1] << 16) |
+                (response[2] << 8) | (response[3] << 0);
+        if (rspstatus & 0x80000000)
+            host->status &= 0xe000;
+        else
+            host->status |= 0x1000;
+        break;
+
+    case sd_r6:
+        if (rsplen < 4) {
+            timeout = 1;
+            break;
+        }
+        rsplen = 4;
+
+        mask = 0xe000 | AKE_SEQ_ERROR;
+        rspstatus = (response[2] << 8) | (response[3] << 0);
+    }
+
+    if (rspstatus & mask)
+        host->status |= 0x4000;
+    else
+        host->status &= 0xb000;
+
+    if (rsplen)
+        for (rsplen = 0; rsplen < 8; rsplen ++)
+            host->rsp[~rsplen & 7] = response[(rsplen << 1) | 1] |
+                    (response[(rsplen << 1) | 0] << 8);
+
+    if (timeout)
+        host->status |= 0x0080;
+    else if (cmd == 12)
+        host->status |= 0x0005;	/* Makes it more real */
+    else
+        host->status |= 0x0001;
+}
+
+static void omap_mmc_transfer(struct omap_mmc_s *host)
+{
+    uint8_t value;
+
+    if (!host->transfer)
+        return;
+
+    while (1) {
+        if (host->ddir) {
+            if (host->fifo_len > host->af_level)
+                break;
+
+            value = sd_read_data(host->card);
+            host->fifo[(host->fifo_start + host->fifo_len) & 31] = value;
+            if (-- host->blen_counter) {
+                value = sd_read_data(host->card);
+                host->fifo[(host->fifo_start + host->fifo_len) & 31] |=
+                        value << 8;
+                host->blen_counter --;
+            }
+
+            host->fifo_len ++;
+        } else {
+            if (!host->fifo_len)
+                break;
+
+            value = host->fifo[host->fifo_start] & 0xff;
+            sd_write_data(host->card, value);
+            if (-- host->blen_counter) {
+                value = host->fifo[host->fifo_start] >> 8;
+                sd_write_data(host->card, value);
+                host->blen_counter --;
+            }
+
+            host->fifo_start ++;
+            host->fifo_len --;
+            host->fifo_start &= 31;
+        }
+
+        if (host->blen_counter == 0) {
+            host->nblk_counter --;
+            host->blen_counter = host->blen;
+
+            if (host->nblk_counter == 0) {
+                host->nblk_counter = host->nblk;
+                host->transfer = 0;
+                host->status |= 0x0008;
+                break;
+            }
+        }
+    }
+}
+
+static void omap_mmc_update(void *opaque)
+{
+    struct omap_mmc_s *s = opaque;
+    omap_mmc_transfer(s);
+    omap_mmc_fifolevel_update(s);
+    omap_mmc_interrupts_update(s);
+}
+
+static uint32_t omap_mmc_read(void *opaque, target_phys_addr_t offset)
+{
+    uint16_t i;
+    struct omap_mmc_s *s = (struct omap_mmc_s *) opaque;
+    offset -= s->base;
+
+    switch (offset) {
+    case 0x00:	/* MMC_CMD */
+        return s->last_cmd;
+
+    case 0x04:	/* MMC_ARGL */
+        return s->arg & 0x0000ffff;
+
+    case 0x08:	/* MMC_ARGH */
+        return s->arg >> 16;
+
+    case 0x0c:	/* MMC_CON */
+        return (s->dw << 15) | (s->mode << 12) | (s->enable << 11);
+
+    case 0x10:	/* MMC_STAT */
+        return s->status;
+
+    case 0x14:	/* MMC_IE */
+        return s->mask;
+
+    case 0x18:	/* MMC_CTO */
+        return s->cto;
+
+    case 0x1c:	/* MMC_DTO */
+        return s->dto;
+
+    case 0x20:	/* MMC_DATA */
+        /* TODO: support 8-bit access */
+        i = s->fifo[s->fifo_start];
+        if (s->fifo_len == 0) {
+            printf("MMC: FIFO underrun\n");
+            return i;
+        }
+        s->fifo_start ++;
+        s->fifo_len --;
+        s->fifo_start &= 31;
+        omap_mmc_transfer(s);
+        omap_mmc_fifolevel_update(s);
+        omap_mmc_interrupts_update(s);
+        return i;
+
+    case 0x24:	/* MMC_BLEN */
+        return s->blen_counter;
+
+    case 0x28:	/* MMC_NBLK */
+        return s->nblk_counter;
+
+    case 0x2c:	/* MMC_BUF */
+        return (s->rx_dma << 15) | (s->af_level << 8) |
+            (s->tx_dma << 7) | s->ae_level;
+
+    case 0x30:	/* MMC_SPI */
+        return 0x0000;
+    case 0x34:	/* MMC_SDIO */
+        return s->sdio;
+    case 0x38:	/* MMC_SYST */
+        return 0x0000;
+
+    case 0x3c:	/* MMC_REV */
+        return 0x0001;
+
+    case 0x40:	/* MMC_RSP0 */
+    case 0x44:	/* MMC_RSP1 */
+    case 0x48:	/* MMC_RSP2 */
+    case 0x4c:	/* MMC_RSP3 */
+    case 0x50:	/* MMC_RSP4 */
+    case 0x54:	/* MMC_RSP5 */
+    case 0x58:	/* MMC_RSP6 */
+    case 0x5c:	/* MMC_RSP7 */
+        return s->rsp[(offset - 0x40) >> 2];
+    }
+
+    OMAP_BAD_REG(offset);
+    return 0;
+}
+
+static void omap_mmc_write(void *opaque, target_phys_addr_t offset,
+                uint32_t value)
+{
+    int i;
+    struct omap_mmc_s *s = (struct omap_mmc_s *) opaque;
+    offset -= s->base;
+
+    switch (offset) {
+    case 0x00:	/* MMC_CMD */
+        if (!s->enable)
+            break;
+
+        s->last_cmd = value;
+        for (i = 0; i < 8; i ++)
+            s->rsp[i] = 0x0000;
+        omap_mmc_command(s, value & 63, (value >> 15) & 1,
+                (sd_cmd_type_t) ((value >> 12) & 3),
+                (value >> 11) & 1,
+                (sd_rsp_type_t) ((value >> 8) & 7),
+                (value >> 7) & 1);
+        omap_mmc_update(s);
+        break;
+
+    case 0x04:	/* MMC_ARGL */
+        s->arg &= 0xffff0000;
+        s->arg |= 0x0000ffff & value;
+        break;
+
+    case 0x08:	/* MMC_ARGH */
+        s->arg &= 0x0000ffff;
+        s->arg |= value << 16;
+        break;
+
+    case 0x0c:	/* MMC_CON */
+        s->dw = (value >> 15) & 1;
+        s->mode = (value >> 12) & 3;
+        s->enable = (value >> 11) & 1;
+        if (s->mode != 0)
+            printf("SD mode %i unimplemented!\n", s->mode);
+        if (s->dw != 0)
+            printf("4-bit SD bus enabled\n");
+        break;
+
+    case 0x10:	/* MMC_STAT */
+        s->status &= ~value;
+        omap_mmc_interrupts_update(s);
+        break;
+
+    case 0x14:	/* MMC_IE */
+        s->mask = value;
+        omap_mmc_interrupts_update(s);
+        break;
+
+    case 0x18:	/* MMC_CTO */
+        s->cto = value & 0xff;
+        if (s->cto > 0xfd)
+            printf("MMC: CTO of 0xff and 0xfe cannot be used!\n");
+        break;
+
+    case 0x1c:	/* MMC_DTO */
+        s->dto = value & 0xffff;
+        break;
+
+    case 0x20:	/* MMC_DATA */
+        /* TODO: support 8-bit access */
+        if (s->fifo_len == 32)
+            break;
+        s->fifo[(s->fifo_start + s->fifo_len) & 31] = value;
+        s->fifo_len ++;
+        omap_mmc_transfer(s);
+        omap_mmc_fifolevel_update(s);
+        omap_mmc_interrupts_update(s);
+        break;
+
+    case 0x24:	/* MMC_BLEN */
+        s->blen = (value & 0x07ff) + 1;
+        s->blen_counter = s->blen;
+        break;
+
+    case 0x28:	/* MMC_NBLK */
+        s->nblk = (value & 0x07ff) + 1;
+        s->nblk_counter = s->nblk;
+        s->blen_counter = s->blen;
+        break;
+
+    case 0x2c:	/* MMC_BUF */
+        s->rx_dma = (value >> 15) & 1;
+        s->af_level = (value >> 8) & 0x1f;
+        s->tx_dma = (value >> 7) & 1;
+        s->ae_level = value & 0x1f;
+
+        if (s->rx_dma)
+            s->status &= 0xfbff;
+        if (s->tx_dma)
+            s->status &= 0xf7ff;
+        omap_mmc_fifolevel_update(s);
+        omap_mmc_interrupts_update(s);
+        break;
+
+    /* SPI, SDIO and TEST modes unimplemented */
+    case 0x30:	/* MMC_SPI */
+        break;
+    case 0x34:	/* MMC_SDIO */
+        s->sdio = value & 0x2020;
+        break;
+    case 0x38:	/* MMC_SYST */
+        break;
+
+    case 0x3c:	/* MMC_REV */
+    case 0x40:	/* MMC_RSP0 */
+    case 0x44:	/* MMC_RSP1 */
+    case 0x48:	/* MMC_RSP2 */
+    case 0x4c:	/* MMC_RSP3 */
+    case 0x50:	/* MMC_RSP4 */
+    case 0x54:	/* MMC_RSP5 */
+    case 0x58:	/* MMC_RSP6 */
+    case 0x5c:	/* MMC_RSP7 */
+        OMAP_RO_REG(offset);
+        break;
+
+    default:
+        OMAP_BAD_REG(offset);
+    }
+}
+
+static CPUReadMemoryFunc *omap_mmc_readfn[] = {
+    omap_badwidth_read16,
+    omap_mmc_read,
+    omap_badwidth_read16,
+};
+
+static CPUWriteMemoryFunc *omap_mmc_writefn[] = {
+    omap_badwidth_write16,
+    omap_mmc_write,
+    omap_badwidth_write16,
+};
+
+void omap_mmc_reset(struct omap_mmc_s *host)
+{
+    host->last_cmd = 0;
+    memset(host->rsp, 0, sizeof(host->rsp));
+    host->arg = 0;
+    host->dw = 0;
+    host->mode = 0;
+    host->enable = 0;
+    host->status = 0;
+    host->mask = 0;
+    host->cto = 0;
+    host->dto = 0;
+    host->fifo_len = 0;
+    host->blen = 0;
+    host->blen_counter = 0;
+    host->nblk = 0;
+    host->nblk_counter = 0;
+    host->tx_dma = 0;
+    host->rx_dma = 0;
+    host->ae_level = 0x00;
+    host->af_level = 0x1f;
+    host->transfer = 0;
+}
+
+struct omap_mmc_s *omap_mmc_init(target_phys_addr_t base,
+                qemu_irq irq, qemu_irq dma[], omap_clk clk)
+{
+    int iomemtype;
+    struct omap_mmc_s *s = (struct omap_mmc_s *)
+            qemu_mallocz(sizeof(struct omap_mmc_s));
+
+    s->irq = irq;
+    s->base = base;
+    s->dma = dma;
+    s->clk = clk;
+
+    iomemtype = cpu_register_io_memory(0, omap_mmc_readfn,
+                    omap_mmc_writefn, s);
+    cpu_register_physical_memory(s->base, 0x800, iomemtype);
+
+    /* Instantiate the storage */
+    s->card = sd_init(sd_bdrv);
+
+    return s;
+}
+
+/* TODO: insertion and read-only handlers */