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Message-Id: <1425497592-1831064-3-git-send-email-arnd@arndb.de>
Date: Wed, 4 Mar 2015 20:32:56 +0100
From: Arnd Bergmann <arnd@...db.de>
To: linux-arm-msm@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org,
David Brown <davidb@...eaurora.org>,
Daniel Walker <dwalker@...o99.com>,
Bryan Huntsman <bryanh@...eaurora.org>,
Stephen Boyd <sboyd@...eaurora.org>,
Tim Bird <tim.bird@...ymobile.com>,
Bjorn Andersson <bjorn.andersson@...ymobile.com>,
Linus Walleij <linus.walleij@...aro.org>,
linux-kernel@...r.kernel.org,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Ulf Hansson <ulf.hansson@...aro.org>,
Arnd Bergmann <arnd@...db.de>
Subject: [RFC PATCH 02/18] mmc: msm: move data mover into mmc driver
The msm_sdcc driver is the only user of the proprietary msm
data mover interface. In order to simplify the multiplatform
conversion, this patch moves the entire data mover code into
the mmc driver.
If against our expectations any other drivers should be added
in the future that use the same data mover, the best approach
would be to convert this code into a dmaengine driver and use
the generic interfaces for that.
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
arch/arm/mach-msm/Makefile | 6 +-
arch/arm/mach-msm/board-msm7x30.c | 1 -
arch/arm/mach-msm/devices-msm7x30.c | 1 -
arch/arm/mach-msm/devices-qsd8x50.c | 1 -
arch/arm/mach-msm/dma.c | 298 -----------------------------
arch/arm/mach-msm/include/mach/dma.h | 151 ---------------
drivers/mmc/host/msm_sdcc.c | 360 ++++++++++++++++++++++++++++++++++-
7 files changed, 362 insertions(+), 456 deletions(-)
delete mode 100644 arch/arm/mach-msm/dma.c
delete mode 100644 arch/arm/mach-msm/include/mach/dma.h
diff --git a/arch/arm/mach-msm/Makefile b/arch/arm/mach-msm/Makefile
index 27c078a568df..2fb46dc0ead8 100644
--- a/arch/arm/mach-msm/Makefile
+++ b/arch/arm/mach-msm/Makefile
@@ -7,9 +7,9 @@ obj-$(CONFIG_ARCH_QSD8X50) += sirc.o
obj-$(CONFIG_MSM_PROC_COMM) += proc_comm.o clock-pcom.o vreg.o
-obj-$(CONFIG_ARCH_MSM7X00A) += dma.o io.o
-obj-$(CONFIG_ARCH_MSM7X30) += dma.o io.o
-obj-$(CONFIG_ARCH_QSD8X50) += dma.o io.o
+obj-$(CONFIG_ARCH_MSM7X00A) += io.o
+obj-$(CONFIG_ARCH_MSM7X30) += io.o
+obj-$(CONFIG_ARCH_QSD8X50) += io.o
obj-$(CONFIG_MSM_SMD) += smd.o smd_debug.o
obj-$(CONFIG_MSM_SMD) += last_radio_log.o
diff --git a/arch/arm/mach-msm/board-msm7x30.c b/arch/arm/mach-msm/board-msm7x30.c
index 8f5ecdc4f3ce..44a5bdbf0ee7 100644
--- a/arch/arm/mach-msm/board-msm7x30.c
+++ b/arch/arm/mach-msm/board-msm7x30.c
@@ -32,7 +32,6 @@
#include <mach/clk.h>
#include <mach/msm_iomap.h>
-#include <mach/dma.h>
#include <mach/vreg.h>
#include "devices.h"
diff --git a/arch/arm/mach-msm/devices-msm7x30.c b/arch/arm/mach-msm/devices-msm7x30.c
index c15ea8ab20a7..5a0705b55321 100644
--- a/arch/arm/mach-msm/devices-msm7x30.c
+++ b/arch/arm/mach-msm/devices-msm7x30.c
@@ -20,7 +20,6 @@
#include <linux/clkdev.h>
#include <mach/irqs.h>
#include <mach/msm_iomap.h>
-#include <mach/dma.h>
#include "devices.h"
#include "smd_private.h"
diff --git a/arch/arm/mach-msm/devices-qsd8x50.c b/arch/arm/mach-msm/devices-qsd8x50.c
index 9e1e9ce07b1a..dfc884521fc1 100644
--- a/arch/arm/mach-msm/devices-qsd8x50.c
+++ b/arch/arm/mach-msm/devices-qsd8x50.c
@@ -20,7 +20,6 @@
#include <mach/irqs.h>
#include <mach/msm_iomap.h>
-#include <mach/dma.h>
#include "devices.h"
#include "common.h"
diff --git a/arch/arm/mach-msm/dma.c b/arch/arm/mach-msm/dma.c
deleted file mode 100644
index fb9762464718..000000000000
--- a/arch/arm/mach-msm/dma.c
+++ /dev/null
@@ -1,298 +0,0 @@
-/* linux/arch/arm/mach-msm/dma.c
- *
- * Copyright (C) 2007 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
- *
- */
-
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/interrupt.h>
-#include <linux/completion.h>
-#include <linux/module.h>
-#include <mach/dma.h>
-#include <mach/msm_iomap.h>
-
-#define MSM_DMOV_CHANNEL_COUNT 16
-
-#define DMOV_SD0(off, ch) (MSM_DMOV_BASE + 0x0000 + (off) + ((ch) << 2))
-#define DMOV_SD1(off, ch) (MSM_DMOV_BASE + 0x0400 + (off) + ((ch) << 2))
-#define DMOV_SD2(off, ch) (MSM_DMOV_BASE + 0x0800 + (off) + ((ch) << 2))
-#define DMOV_SD3(off, ch) (MSM_DMOV_BASE + 0x0C00 + (off) + ((ch) << 2))
-
-#if defined(CONFIG_ARCH_MSM7X30)
-#define DMOV_SD_AARM DMOV_SD2
-#else
-#define DMOV_SD_AARM DMOV_SD3
-#endif
-
-#define DMOV_CMD_PTR(ch) DMOV_SD_AARM(0x000, ch)
-#define DMOV_RSLT(ch) DMOV_SD_AARM(0x040, ch)
-#define DMOV_FLUSH0(ch) DMOV_SD_AARM(0x080, ch)
-#define DMOV_FLUSH1(ch) DMOV_SD_AARM(0x0C0, ch)
-#define DMOV_FLUSH2(ch) DMOV_SD_AARM(0x100, ch)
-#define DMOV_FLUSH3(ch) DMOV_SD_AARM(0x140, ch)
-#define DMOV_FLUSH4(ch) DMOV_SD_AARM(0x180, ch)
-#define DMOV_FLUSH5(ch) DMOV_SD_AARM(0x1C0, ch)
-
-#define DMOV_STATUS(ch) DMOV_SD_AARM(0x200, ch)
-#define DMOV_ISR DMOV_SD_AARM(0x380, 0)
-
-#define DMOV_CONFIG(ch) DMOV_SD_AARM(0x300, ch)
-
-enum {
- MSM_DMOV_PRINT_ERRORS = 1,
- MSM_DMOV_PRINT_IO = 2,
- MSM_DMOV_PRINT_FLOW = 4
-};
-
-static DEFINE_SPINLOCK(msm_dmov_lock);
-static struct clk *msm_dmov_clk;
-static unsigned int channel_active;
-static struct list_head ready_commands[MSM_DMOV_CHANNEL_COUNT];
-static struct list_head active_commands[MSM_DMOV_CHANNEL_COUNT];
-unsigned int msm_dmov_print_mask = MSM_DMOV_PRINT_ERRORS;
-
-#define MSM_DMOV_DPRINTF(mask, format, args...) \
- do { \
- if ((mask) & msm_dmov_print_mask) \
- printk(KERN_ERR format, args); \
- } while (0)
-#define PRINT_ERROR(format, args...) \
- MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_ERRORS, format, args);
-#define PRINT_IO(format, args...) \
- MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_IO, format, args);
-#define PRINT_FLOW(format, args...) \
- MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_FLOW, format, args);
-
-void msm_dmov_stop_cmd(unsigned id, struct msm_dmov_cmd *cmd, int graceful)
-{
- writel((graceful << 31), DMOV_FLUSH0(id));
-}
-EXPORT_SYMBOL_GPL(msm_dmov_stop_cmd);
-
-void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd)
-{
- unsigned long irq_flags;
- unsigned int status;
-
- spin_lock_irqsave(&msm_dmov_lock, irq_flags);
- if (!channel_active)
- clk_enable(msm_dmov_clk);
- dsb();
- status = readl(DMOV_STATUS(id));
- if (list_empty(&ready_commands[id]) &&
- (status & DMOV_STATUS_CMD_PTR_RDY)) {
-#if 0
- if (list_empty(&active_commands[id])) {
- PRINT_FLOW("msm_dmov_enqueue_cmd(%d), enable interrupt\n", id);
- writel(DMOV_CONFIG_IRQ_EN, DMOV_CONFIG(id));
- }
-#endif
- if (cmd->execute_func)
- cmd->execute_func(cmd);
- PRINT_IO("msm_dmov_enqueue_cmd(%d), start command, status %x\n", id, status);
- list_add_tail(&cmd->list, &active_commands[id]);
- if (!channel_active)
- enable_irq(INT_ADM_AARM);
- channel_active |= 1U << id;
- writel(cmd->cmdptr, DMOV_CMD_PTR(id));
- } else {
- if (!channel_active)
- clk_disable(msm_dmov_clk);
- if (list_empty(&active_commands[id]))
- PRINT_ERROR("msm_dmov_enqueue_cmd(%d), error datamover stalled, status %x\n", id, status);
-
- PRINT_IO("msm_dmov_enqueue_cmd(%d), enqueue command, status %x\n", id, status);
- list_add_tail(&cmd->list, &ready_commands[id]);
- }
- spin_unlock_irqrestore(&msm_dmov_lock, irq_flags);
-}
-EXPORT_SYMBOL_GPL(msm_dmov_enqueue_cmd);
-
-struct msm_dmov_exec_cmdptr_cmd {
- struct msm_dmov_cmd dmov_cmd;
- struct completion complete;
- unsigned id;
- unsigned int result;
- struct msm_dmov_errdata err;
-};
-
-static void
-dmov_exec_cmdptr_complete_func(struct msm_dmov_cmd *_cmd,
- unsigned int result,
- struct msm_dmov_errdata *err)
-{
- struct msm_dmov_exec_cmdptr_cmd *cmd = container_of(_cmd, struct msm_dmov_exec_cmdptr_cmd, dmov_cmd);
- cmd->result = result;
- if (result != 0x80000002 && err)
- memcpy(&cmd->err, err, sizeof(struct msm_dmov_errdata));
-
- complete(&cmd->complete);
-}
-
-int msm_dmov_exec_cmd(unsigned id, unsigned int cmdptr)
-{
- struct msm_dmov_exec_cmdptr_cmd cmd;
-
- PRINT_FLOW("dmov_exec_cmdptr(%d, %x)\n", id, cmdptr);
-
- cmd.dmov_cmd.cmdptr = cmdptr;
- cmd.dmov_cmd.complete_func = dmov_exec_cmdptr_complete_func;
- cmd.dmov_cmd.execute_func = NULL;
- cmd.id = id;
- init_completion(&cmd.complete);
-
- msm_dmov_enqueue_cmd(id, &cmd.dmov_cmd);
- wait_for_completion(&cmd.complete);
-
- if (cmd.result != 0x80000002) {
- PRINT_ERROR("dmov_exec_cmdptr(%d): ERROR, result: %x\n", id, cmd.result);
- PRINT_ERROR("dmov_exec_cmdptr(%d): flush: %x %x %x %x\n",
- id, cmd.err.flush[0], cmd.err.flush[1], cmd.err.flush[2], cmd.err.flush[3]);
- return -EIO;
- }
- PRINT_FLOW("dmov_exec_cmdptr(%d, %x) done\n", id, cmdptr);
- return 0;
-}
-
-
-static irqreturn_t msm_datamover_irq_handler(int irq, void *dev_id)
-{
- unsigned int int_status, mask, id;
- unsigned long irq_flags;
- unsigned int ch_status;
- unsigned int ch_result;
- struct msm_dmov_cmd *cmd;
-
- spin_lock_irqsave(&msm_dmov_lock, irq_flags);
-
- int_status = readl(DMOV_ISR); /* read and clear interrupt */
- PRINT_FLOW("msm_datamover_irq_handler: DMOV_ISR %x\n", int_status);
-
- while (int_status) {
- mask = int_status & -int_status;
- id = fls(mask) - 1;
- PRINT_FLOW("msm_datamover_irq_handler %08x %08x id %d\n", int_status, mask, id);
- int_status &= ~mask;
- ch_status = readl(DMOV_STATUS(id));
- if (!(ch_status & DMOV_STATUS_RSLT_VALID)) {
- PRINT_FLOW("msm_datamover_irq_handler id %d, result not valid %x\n", id, ch_status);
- continue;
- }
- do {
- ch_result = readl(DMOV_RSLT(id));
- if (list_empty(&active_commands[id])) {
- PRINT_ERROR("msm_datamover_irq_handler id %d, got result "
- "with no active command, status %x, result %x\n",
- id, ch_status, ch_result);
- cmd = NULL;
- } else
- cmd = list_entry(active_commands[id].next, typeof(*cmd), list);
- PRINT_FLOW("msm_datamover_irq_handler id %d, status %x, result %x\n", id, ch_status, ch_result);
- if (ch_result & DMOV_RSLT_DONE) {
- PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n",
- id, ch_status);
- PRINT_IO("msm_datamover_irq_handler id %d, got result "
- "for %p, result %x\n", id, cmd, ch_result);
- if (cmd) {
- list_del(&cmd->list);
- dsb();
- cmd->complete_func(cmd, ch_result, NULL);
- }
- }
- if (ch_result & DMOV_RSLT_FLUSH) {
- struct msm_dmov_errdata errdata;
-
- errdata.flush[0] = readl(DMOV_FLUSH0(id));
- errdata.flush[1] = readl(DMOV_FLUSH1(id));
- errdata.flush[2] = readl(DMOV_FLUSH2(id));
- errdata.flush[3] = readl(DMOV_FLUSH3(id));
- errdata.flush[4] = readl(DMOV_FLUSH4(id));
- errdata.flush[5] = readl(DMOV_FLUSH5(id));
- PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
- PRINT_FLOW("msm_datamover_irq_handler id %d, flush, result %x, flush0 %x\n", id, ch_result, errdata.flush[0]);
- if (cmd) {
- list_del(&cmd->list);
- dsb();
- cmd->complete_func(cmd, ch_result, &errdata);
- }
- }
- if (ch_result & DMOV_RSLT_ERROR) {
- struct msm_dmov_errdata errdata;
-
- errdata.flush[0] = readl(DMOV_FLUSH0(id));
- errdata.flush[1] = readl(DMOV_FLUSH1(id));
- errdata.flush[2] = readl(DMOV_FLUSH2(id));
- errdata.flush[3] = readl(DMOV_FLUSH3(id));
- errdata.flush[4] = readl(DMOV_FLUSH4(id));
- errdata.flush[5] = readl(DMOV_FLUSH5(id));
-
- PRINT_ERROR("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
- PRINT_ERROR("msm_datamover_irq_handler id %d, error, result %x, flush0 %x\n", id, ch_result, errdata.flush[0]);
- if (cmd) {
- list_del(&cmd->list);
- dsb();
- cmd->complete_func(cmd, ch_result, &errdata);
- }
- /* this does not seem to work, once we get an error */
- /* the datamover will no longer accept commands */
- writel(0, DMOV_FLUSH0(id));
- }
- ch_status = readl(DMOV_STATUS(id));
- PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
- if ((ch_status & DMOV_STATUS_CMD_PTR_RDY) && !list_empty(&ready_commands[id])) {
- cmd = list_entry(ready_commands[id].next, typeof(*cmd), list);
- list_move_tail(&cmd->list, &active_commands[id]);
- if (cmd->execute_func)
- cmd->execute_func(cmd);
- PRINT_FLOW("msm_datamover_irq_handler id %d, start command\n", id);
- writel(cmd->cmdptr, DMOV_CMD_PTR(id));
- }
- } while (ch_status & DMOV_STATUS_RSLT_VALID);
- if (list_empty(&active_commands[id]) && list_empty(&ready_commands[id]))
- channel_active &= ~(1U << id);
- PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
- }
-
- if (!channel_active) {
- disable_irq_nosync(INT_ADM_AARM);
- clk_disable(msm_dmov_clk);
- }
-
- spin_unlock_irqrestore(&msm_dmov_lock, irq_flags);
- return IRQ_HANDLED;
-}
-
-static int __init msm_init_datamover(void)
-{
- int i;
- int ret;
- struct clk *clk;
-
- for (i = 0; i < MSM_DMOV_CHANNEL_COUNT; i++) {
- INIT_LIST_HEAD(&ready_commands[i]);
- INIT_LIST_HEAD(&active_commands[i]);
- writel(DMOV_CONFIG_IRQ_EN | DMOV_CONFIG_FORCE_TOP_PTR_RSLT | DMOV_CONFIG_FORCE_FLUSH_RSLT, DMOV_CONFIG(i));
- }
- clk = clk_get(NULL, "adm_clk");
- if (IS_ERR(clk))
- return PTR_ERR(clk);
- clk_prepare(clk);
- msm_dmov_clk = clk;
- ret = request_irq(INT_ADM_AARM, msm_datamover_irq_handler, 0, "msmdatamover", NULL);
- if (ret)
- return ret;
- disable_irq(INT_ADM_AARM);
- return 0;
-}
-module_init(msm_init_datamover);
diff --git a/arch/arm/mach-msm/include/mach/dma.h b/arch/arm/mach-msm/include/mach/dma.h
deleted file mode 100644
index a72d48d42342..000000000000
--- a/arch/arm/mach-msm/include/mach/dma.h
+++ /dev/null
@@ -1,151 +0,0 @@
-/* linux/include/asm-arm/arch-msm/dma.h
- *
- * Copyright (C) 2007 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
- *
- */
-
-#ifndef __ASM_ARCH_MSM_DMA_H
-
-#include <linux/list.h>
-
-struct msm_dmov_errdata {
- uint32_t flush[6];
-};
-
-struct msm_dmov_cmd {
- struct list_head list;
- unsigned int cmdptr;
- void (*complete_func)(struct msm_dmov_cmd *cmd,
- unsigned int result,
- struct msm_dmov_errdata *err);
- void (*execute_func)(struct msm_dmov_cmd *cmd);
- void *data;
-};
-
-#ifndef CONFIG_ARCH_MSM8X60
-void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd);
-void msm_dmov_stop_cmd(unsigned id, struct msm_dmov_cmd *cmd, int graceful);
-int msm_dmov_exec_cmd(unsigned id, unsigned int cmdptr);
-#else
-static inline
-void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd) { }
-static inline
-void msm_dmov_stop_cmd(unsigned id, struct msm_dmov_cmd *cmd, int graceful) { }
-static inline
-int msm_dmov_exec_cmd(unsigned id, unsigned int cmdptr) { return -EIO; }
-#endif
-
-#define DMOV_CMD_LIST (0 << 29) /* does not work */
-#define DMOV_CMD_PTR_LIST (1 << 29) /* works */
-#define DMOV_CMD_INPUT_CFG (2 << 29) /* untested */
-#define DMOV_CMD_OUTPUT_CFG (3 << 29) /* untested */
-#define DMOV_CMD_ADDR(addr) ((addr) >> 3)
-
-#define DMOV_RSLT_VALID (1 << 31) /* 0 == host has empties result fifo */
-#define DMOV_RSLT_ERROR (1 << 3)
-#define DMOV_RSLT_FLUSH (1 << 2)
-#define DMOV_RSLT_DONE (1 << 1) /* top pointer done */
-#define DMOV_RSLT_USER (1 << 0) /* command with FR force result */
-
-#define DMOV_STATUS_RSLT_COUNT(n) (((n) >> 29))
-#define DMOV_STATUS_CMD_COUNT(n) (((n) >> 27) & 3)
-#define DMOV_STATUS_RSLT_VALID (1 << 1)
-#define DMOV_STATUS_CMD_PTR_RDY (1 << 0)
-
-#define DMOV_CONFIG_FORCE_TOP_PTR_RSLT (1 << 2)
-#define DMOV_CONFIG_FORCE_FLUSH_RSLT (1 << 1)
-#define DMOV_CONFIG_IRQ_EN (1 << 0)
-
-/* channel assignments */
-
-#define DMOV_NAND_CHAN 7
-#define DMOV_NAND_CRCI_CMD 5
-#define DMOV_NAND_CRCI_DATA 4
-
-#define DMOV_SDC1_CHAN 8
-#define DMOV_SDC1_CRCI 6
-
-#define DMOV_SDC2_CHAN 8
-#define DMOV_SDC2_CRCI 7
-
-#define DMOV_TSIF_CHAN 10
-#define DMOV_TSIF_CRCI 10
-
-#define DMOV_USB_CHAN 11
-
-/* no client rate control ifc (eg, ram) */
-#define DMOV_NONE_CRCI 0
-
-
-/* If the CMD_PTR register has CMD_PTR_LIST selected, the data mover
- * is going to walk a list of 32bit pointers as described below. Each
- * pointer points to a *array* of dmov_s, etc structs. The last pointer
- * in the list is marked with CMD_PTR_LP. The last struct in each array
- * is marked with CMD_LC (see below).
- */
-#define CMD_PTR_ADDR(addr) ((addr) >> 3)
-#define CMD_PTR_LP (1 << 31) /* last pointer */
-#define CMD_PTR_PT (3 << 29) /* ? */
-
-/* Single Item Mode */
-typedef struct {
- unsigned cmd;
- unsigned src;
- unsigned dst;
- unsigned len;
-} dmov_s;
-
-/* Scatter/Gather Mode */
-typedef struct {
- unsigned cmd;
- unsigned src_dscr;
- unsigned dst_dscr;
- unsigned _reserved;
-} dmov_sg;
-
-/* Box mode */
-typedef struct {
- uint32_t cmd;
- uint32_t src_row_addr;
- uint32_t dst_row_addr;
- uint32_t src_dst_len;
- uint32_t num_rows;
- uint32_t row_offset;
-} dmov_box;
-
-/* bits for the cmd field of the above structures */
-
-#define CMD_LC (1 << 31) /* last command */
-#define CMD_FR (1 << 22) /* force result -- does not work? */
-#define CMD_OCU (1 << 21) /* other channel unblock */
-#define CMD_OCB (1 << 20) /* other channel block */
-#define CMD_TCB (1 << 19) /* ? */
-#define CMD_DAH (1 << 18) /* destination address hold -- does not work?*/
-#define CMD_SAH (1 << 17) /* source address hold -- does not work? */
-
-#define CMD_MODE_SINGLE (0 << 0) /* dmov_s structure used */
-#define CMD_MODE_SG (1 << 0) /* untested */
-#define CMD_MODE_IND_SG (2 << 0) /* untested */
-#define CMD_MODE_BOX (3 << 0) /* untested */
-
-#define CMD_DST_SWAP_BYTES (1 << 14) /* exchange each byte n with byte n+1 */
-#define CMD_DST_SWAP_SHORTS (1 << 15) /* exchange each short n with short n+1 */
-#define CMD_DST_SWAP_WORDS (1 << 16) /* exchange each word n with word n+1 */
-
-#define CMD_SRC_SWAP_BYTES (1 << 11) /* exchange each byte n with byte n+1 */
-#define CMD_SRC_SWAP_SHORTS (1 << 12) /* exchange each short n with short n+1 */
-#define CMD_SRC_SWAP_WORDS (1 << 13) /* exchange each word n with word n+1 */
-
-#define CMD_DST_CRCI(n) (((n) & 15) << 7)
-#define CMD_SRC_CRCI(n) (((n) & 15) << 3)
-
-#endif
diff --git a/drivers/mmc/host/msm_sdcc.c b/drivers/mmc/host/msm_sdcc.c
index 90c60fd4ff6e..83dc4e5d9963 100644
--- a/drivers/mmc/host/msm_sdcc.c
+++ b/drivers/mmc/host/msm_sdcc.c
@@ -15,6 +15,7 @@
*
*/
+#include <linux/completion.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
@@ -24,6 +25,7 @@
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/highmem.h>
+#include <linux/list.h>
#include <linux/log2.h>
#include <linux/mmc/host.h>
#include <linux/mmc/card.h>
@@ -43,9 +45,365 @@
#include <asm/sizes.h>
#include <linux/platform_data/mmc-msm_sdcc.h>
-#include <mach/dma.h>
+#include <mach/msm_iomap.h>
#include <mach/clk.h>
+/* data mover definitions */
+
+struct msm_dmov_errdata {
+ uint32_t flush[6];
+};
+
+struct msm_dmov_cmd {
+ struct list_head list;
+ unsigned int cmdptr;
+ void (*complete_func)(struct msm_dmov_cmd *cmd,
+ unsigned int result,
+ struct msm_dmov_errdata *err);
+ void (*execute_func)(struct msm_dmov_cmd *cmd);
+ void *data;
+};
+
+#define DMOV_CMD_LIST (0 << 29) /* does not work */
+#define DMOV_CMD_PTR_LIST (1 << 29) /* works */
+#define DMOV_CMD_INPUT_CFG (2 << 29) /* untested */
+#define DMOV_CMD_OUTPUT_CFG (3 << 29) /* untested */
+#define DMOV_CMD_ADDR(addr) ((addr) >> 3)
+
+#define DMOV_RSLT_VALID (1 << 31) /* 0 == host has empties result fifo */
+#define DMOV_RSLT_ERROR (1 << 3)
+#define DMOV_RSLT_FLUSH (1 << 2)
+#define DMOV_RSLT_DONE (1 << 1) /* top pointer done */
+#define DMOV_RSLT_USER (1 << 0) /* command with FR force result */
+
+#define DMOV_STATUS_RSLT_COUNT(n) (((n) >> 29))
+#define DMOV_STATUS_CMD_COUNT(n) (((n) >> 27) & 3)
+#define DMOV_STATUS_RSLT_VALID (1 << 1)
+#define DMOV_STATUS_CMD_PTR_RDY (1 << 0)
+
+#define DMOV_CONFIG_FORCE_TOP_PTR_RSLT (1 << 2)
+#define DMOV_CONFIG_FORCE_FLUSH_RSLT (1 << 1)
+#define DMOV_CONFIG_IRQ_EN (1 << 0)
+
+/* channel assignments */
+
+#define DMOV_NAND_CHAN 7
+#define DMOV_NAND_CRCI_CMD 5
+#define DMOV_NAND_CRCI_DATA 4
+
+#define DMOV_SDC1_CHAN 8
+#define DMOV_SDC1_CRCI 6
+
+#define DMOV_SDC2_CHAN 8
+#define DMOV_SDC2_CRCI 7
+
+#define DMOV_TSIF_CHAN 10
+#define DMOV_TSIF_CRCI 10
+
+#define DMOV_USB_CHAN 11
+
+/* no client rate control ifc (eg, ram) */
+#define DMOV_NONE_CRCI 0
+
+
+/* If the CMD_PTR register has CMD_PTR_LIST selected, the data mover
+ * is going to walk a list of 32bit pointers as described below. Each
+ * pointer points to a *array* of dmov_s, etc structs. The last pointer
+ * in the list is marked with CMD_PTR_LP. The last struct in each array
+ * is marked with CMD_LC (see below).
+ */
+#define CMD_PTR_ADDR(addr) ((addr) >> 3)
+#define CMD_PTR_LP (1 << 31) /* last pointer */
+#define CMD_PTR_PT (3 << 29) /* ? */
+
+/* Single Item Mode */
+typedef struct {
+ unsigned cmd;
+ unsigned src;
+ unsigned dst;
+ unsigned len;
+} dmov_s;
+
+/* Scatter/Gather Mode */
+typedef struct {
+ unsigned cmd;
+ unsigned src_dscr;
+ unsigned dst_dscr;
+ unsigned _reserved;
+} dmov_sg;
+
+/* Box mode */
+typedef struct {
+ uint32_t cmd;
+ uint32_t src_row_addr;
+ uint32_t dst_row_addr;
+ uint32_t src_dst_len;
+ uint32_t num_rows;
+ uint32_t row_offset;
+} dmov_box;
+
+/* bits for the cmd field of the above structures */
+
+#define CMD_LC (1 << 31) /* last command */
+#define CMD_FR (1 << 22) /* force result -- does not work? */
+#define CMD_OCU (1 << 21) /* other channel unblock */
+#define CMD_OCB (1 << 20) /* other channel block */
+#define CMD_TCB (1 << 19) /* ? */
+#define CMD_DAH (1 << 18) /* destination address hold -- does not work?*/
+#define CMD_SAH (1 << 17) /* source address hold -- does not work? */
+
+#define CMD_MODE_SINGLE (0 << 0) /* dmov_s structure used */
+#define CMD_MODE_SG (1 << 0) /* untested */
+#define CMD_MODE_IND_SG (2 << 0) /* untested */
+#define CMD_MODE_BOX (3 << 0) /* untested */
+
+#define CMD_DST_SWAP_BYTES (1 << 14) /* exchange each byte n with byte n+1 */
+#define CMD_DST_SWAP_SHORTS (1 << 15) /* exchange each short n with short n+1 */
+#define CMD_DST_SWAP_WORDS (1 << 16) /* exchange each word n with word n+1 */
+
+#define CMD_SRC_SWAP_BYTES (1 << 11) /* exchange each byte n with byte n+1 */
+#define CMD_SRC_SWAP_SHORTS (1 << 12) /* exchange each short n with short n+1 */
+#define CMD_SRC_SWAP_WORDS (1 << 13) /* exchange each word n with word n+1 */
+
+#define CMD_DST_CRCI(n) (((n) & 15) << 7)
+#define CMD_SRC_CRCI(n) (((n) & 15) << 3)
+
+#define MSM_DMOV_CHANNEL_COUNT 16
+
+#define DMOV_SD0(off, ch) (MSM_DMOV_BASE + 0x0000 + (off) + ((ch) << 2))
+#define DMOV_SD1(off, ch) (MSM_DMOV_BASE + 0x0400 + (off) + ((ch) << 2))
+#define DMOV_SD2(off, ch) (MSM_DMOV_BASE + 0x0800 + (off) + ((ch) << 2))
+#define DMOV_SD3(off, ch) (MSM_DMOV_BASE + 0x0C00 + (off) + ((ch) << 2))
+
+#if defined(CONFIG_ARCH_MSM7X30)
+#define DMOV_SD_AARM DMOV_SD2
+#else
+#define DMOV_SD_AARM DMOV_SD3
+#endif
+
+#define DMOV_CMD_PTR(ch) DMOV_SD_AARM(0x000, ch)
+#define DMOV_RSLT(ch) DMOV_SD_AARM(0x040, ch)
+#define DMOV_FLUSH0(ch) DMOV_SD_AARM(0x080, ch)
+#define DMOV_FLUSH1(ch) DMOV_SD_AARM(0x0C0, ch)
+#define DMOV_FLUSH2(ch) DMOV_SD_AARM(0x100, ch)
+#define DMOV_FLUSH3(ch) DMOV_SD_AARM(0x140, ch)
+#define DMOV_FLUSH4(ch) DMOV_SD_AARM(0x180, ch)
+#define DMOV_FLUSH5(ch) DMOV_SD_AARM(0x1C0, ch)
+
+#define DMOV_STATUS(ch) DMOV_SD_AARM(0x200, ch)
+#define DMOV_ISR DMOV_SD_AARM(0x380, 0)
+
+#define DMOV_CONFIG(ch) DMOV_SD_AARM(0x300, ch)
+
+enum {
+ MSM_DMOV_PRINT_ERRORS = 1,
+ MSM_DMOV_PRINT_IO = 2,
+ MSM_DMOV_PRINT_FLOW = 4
+};
+
+static DEFINE_SPINLOCK(msm_dmov_lock);
+static struct clk *msm_dmov_clk;
+static unsigned int channel_active;
+static struct list_head ready_commands[MSM_DMOV_CHANNEL_COUNT];
+static struct list_head active_commands[MSM_DMOV_CHANNEL_COUNT];
+static const unsigned int msm_dmov_print_mask = MSM_DMOV_PRINT_ERRORS;
+
+#define MSM_DMOV_DPRINTF(mask, format, args...) \
+ do { \
+ if ((mask) & msm_dmov_print_mask) \
+ printk(KERN_ERR format, args); \
+ } while (0)
+#define PRINT_ERROR(format, args...) \
+ MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_ERRORS, format, args);
+#define PRINT_IO(format, args...) \
+ MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_IO, format, args);
+#define PRINT_FLOW(format, args...) \
+ MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_FLOW, format, args);
+
+static void msm_dmov_stop_cmd(unsigned id, struct msm_dmov_cmd *cmd, int graceful)
+{
+ writel((graceful << 31), DMOV_FLUSH0(id));
+}
+
+static void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd)
+{
+ unsigned long irq_flags;
+ unsigned int status;
+
+ spin_lock_irqsave(&msm_dmov_lock, irq_flags);
+ if (!channel_active)
+ clk_enable(msm_dmov_clk);
+ dsb();
+ status = readl(DMOV_STATUS(id));
+ if (list_empty(&ready_commands[id]) &&
+ (status & DMOV_STATUS_CMD_PTR_RDY)) {
+#if 0
+ if (list_empty(&active_commands[id])) {
+ PRINT_FLOW("msm_dmov_enqueue_cmd(%d), enable interrupt\n", id);
+ writel(DMOV_CONFIG_IRQ_EN, DMOV_CONFIG(id));
+ }
+#endif
+ if (cmd->execute_func)
+ cmd->execute_func(cmd);
+ PRINT_IO("msm_dmov_enqueue_cmd(%d), start command, status %x\n", id, status);
+ list_add_tail(&cmd->list, &active_commands[id]);
+ if (!channel_active)
+ enable_irq(INT_ADM_AARM);
+ channel_active |= 1U << id;
+ writel(cmd->cmdptr, DMOV_CMD_PTR(id));
+ } else {
+ if (!channel_active)
+ clk_disable(msm_dmov_clk);
+ if (list_empty(&active_commands[id]))
+ PRINT_ERROR("msm_dmov_enqueue_cmd(%d), error datamover stalled, status %x\n", id, status);
+
+ PRINT_IO("msm_dmov_enqueue_cmd(%d), enqueue command, status %x\n", id, status);
+ list_add_tail(&cmd->list, &ready_commands[id]);
+ }
+ spin_unlock_irqrestore(&msm_dmov_lock, irq_flags);
+}
+
+struct msm_dmov_exec_cmdptr_cmd {
+ struct msm_dmov_cmd dmov_cmd;
+ struct completion complete;
+ unsigned id;
+ unsigned int result;
+ struct msm_dmov_errdata err;
+};
+
+static irqreturn_t msm_datamover_irq_handler(int irq, void *dev_id)
+{
+ unsigned int int_status, mask, id;
+ unsigned long irq_flags;
+ unsigned int ch_status;
+ unsigned int ch_result;
+ struct msm_dmov_cmd *cmd;
+
+ spin_lock_irqsave(&msm_dmov_lock, irq_flags);
+
+ int_status = readl(DMOV_ISR); /* read and clear interrupt */
+ PRINT_FLOW("msm_datamover_irq_handler: DMOV_ISR %x\n", int_status);
+
+ while (int_status) {
+ mask = int_status & -int_status;
+ id = fls(mask) - 1;
+ PRINT_FLOW("msm_datamover_irq_handler %08x %08x id %d\n", int_status, mask, id);
+ int_status &= ~mask;
+ ch_status = readl(DMOV_STATUS(id));
+ if (!(ch_status & DMOV_STATUS_RSLT_VALID)) {
+ PRINT_FLOW("msm_datamover_irq_handler id %d, result not valid %x\n", id, ch_status);
+ continue;
+ }
+ do {
+ ch_result = readl(DMOV_RSLT(id));
+ if (list_empty(&active_commands[id])) {
+ PRINT_ERROR("msm_datamover_irq_handler id %d, got result "
+ "with no active command, status %x, result %x\n",
+ id, ch_status, ch_result);
+ cmd = NULL;
+ } else
+ cmd = list_entry(active_commands[id].next, typeof(*cmd), list);
+ PRINT_FLOW("msm_datamover_irq_handler id %d, status %x, result %x\n", id, ch_status, ch_result);
+ if (ch_result & DMOV_RSLT_DONE) {
+ PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n",
+ id, ch_status);
+ PRINT_IO("msm_datamover_irq_handler id %d, got result "
+ "for %p, result %x\n", id, cmd, ch_result);
+ if (cmd) {
+ list_del(&cmd->list);
+ dsb();
+ cmd->complete_func(cmd, ch_result, NULL);
+ }
+ }
+ if (ch_result & DMOV_RSLT_FLUSH) {
+ struct msm_dmov_errdata errdata;
+
+ errdata.flush[0] = readl(DMOV_FLUSH0(id));
+ errdata.flush[1] = readl(DMOV_FLUSH1(id));
+ errdata.flush[2] = readl(DMOV_FLUSH2(id));
+ errdata.flush[3] = readl(DMOV_FLUSH3(id));
+ errdata.flush[4] = readl(DMOV_FLUSH4(id));
+ errdata.flush[5] = readl(DMOV_FLUSH5(id));
+ PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
+ PRINT_FLOW("msm_datamover_irq_handler id %d, flush, result %x, flush0 %x\n", id, ch_result, errdata.flush[0]);
+ if (cmd) {
+ list_del(&cmd->list);
+ dsb();
+ cmd->complete_func(cmd, ch_result, &errdata);
+ }
+ }
+ if (ch_result & DMOV_RSLT_ERROR) {
+ struct msm_dmov_errdata errdata;
+
+ errdata.flush[0] = readl(DMOV_FLUSH0(id));
+ errdata.flush[1] = readl(DMOV_FLUSH1(id));
+ errdata.flush[2] = readl(DMOV_FLUSH2(id));
+ errdata.flush[3] = readl(DMOV_FLUSH3(id));
+ errdata.flush[4] = readl(DMOV_FLUSH4(id));
+ errdata.flush[5] = readl(DMOV_FLUSH5(id));
+
+ PRINT_ERROR("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
+ PRINT_ERROR("msm_datamover_irq_handler id %d, error, result %x, flush0 %x\n", id, ch_result, errdata.flush[0]);
+ if (cmd) {
+ list_del(&cmd->list);
+ dsb();
+ cmd->complete_func(cmd, ch_result, &errdata);
+ }
+ /* this does not seem to work, once we get an error */
+ /* the datamover will no longer accept commands */
+ writel(0, DMOV_FLUSH0(id));
+ }
+ ch_status = readl(DMOV_STATUS(id));
+ PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
+ if ((ch_status & DMOV_STATUS_CMD_PTR_RDY) && !list_empty(&ready_commands[id])) {
+ cmd = list_entry(ready_commands[id].next, typeof(*cmd), list);
+ list_move_tail(&cmd->list, &active_commands[id]);
+ if (cmd->execute_func)
+ cmd->execute_func(cmd);
+ PRINT_FLOW("msm_datamover_irq_handler id %d, start command\n", id);
+ writel(cmd->cmdptr, DMOV_CMD_PTR(id));
+ }
+ } while (ch_status & DMOV_STATUS_RSLT_VALID);
+ if (list_empty(&active_commands[id]) && list_empty(&ready_commands[id]))
+ channel_active &= ~(1U << id);
+ PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
+ }
+
+ if (!channel_active) {
+ disable_irq_nosync(INT_ADM_AARM);
+ clk_disable(msm_dmov_clk);
+ }
+
+ spin_unlock_irqrestore(&msm_dmov_lock, irq_flags);
+ return IRQ_HANDLED;
+}
+
+static int __init msm_init_datamover(void)
+{
+ int i;
+ int ret;
+ struct clk *clk;
+
+ for (i = 0; i < MSM_DMOV_CHANNEL_COUNT; i++) {
+ INIT_LIST_HEAD(&ready_commands[i]);
+ INIT_LIST_HEAD(&active_commands[i]);
+ writel(DMOV_CONFIG_IRQ_EN | DMOV_CONFIG_FORCE_TOP_PTR_RSLT | DMOV_CONFIG_FORCE_FLUSH_RSLT, DMOV_CONFIG(i));
+ }
+ clk = clk_get(NULL, "adm_clk");
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+ clk_prepare(clk);
+ msm_dmov_clk = clk;
+ ret = request_irq(INT_ADM_AARM, msm_datamover_irq_handler, 0, "msmdatamover", NULL);
+ if (ret)
+ return ret;
+ disable_irq(INT_ADM_AARM);
+ return 0;
+}
+module_init(msm_init_datamover);
+
+/* now the actual SD card driver */
+
#include "msm_sdcc.h"
#define DRIVER_NAME "msm-sdcc"
--
2.1.0.rc2
--
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