From c0c89fafa289ea241ba3fb22d6f583f8089a719e Mon Sep 17 00:00:00 2001 From: Stephen Boyd Date: Fri, 13 Mar 2015 11:09:34 -0700 Subject: ARM: Remove mach-msm and associated ARM architecture code The maintainers for mach-msm no longer have any plans to support or test the platforms supported by this architecture[1]. Most likely there aren't any active users of this code anyway, so let's delete it. [1] http://lkml.kernel.org/r/20150307031212.GA8434@fifo99.com Cc: David Brown Cc: Bryan Huntsman Cc: Daniel Walker Signed-off-by: Stephen Boyd Signed-off-by: Kumar Gala --- arch/arm/mach-msm/dma.c | 298 ------------------------------------------------ 1 file changed, 298 deletions(-) delete mode 100644 arch/arm/mach-msm/dma.c (limited to 'arch/arm/mach-msm/dma.c') 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 -#include -#include -#include -#include -#include -#include -#include - -#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); -- cgit v1.2.3