diff options
Diffstat (limited to 'drivers/media/video/s5p-mfc/s5p_mfc_ctrl.c')
| -rw-r--r-- | drivers/media/video/s5p-mfc/s5p_mfc_ctrl.c | 343 |
1 files changed, 343 insertions, 0 deletions
diff --git a/drivers/media/video/s5p-mfc/s5p_mfc_ctrl.c b/drivers/media/video/s5p-mfc/s5p_mfc_ctrl.c new file mode 100644 index 000000000000..5f4da80051bb --- /dev/null +++ b/drivers/media/video/s5p-mfc/s5p_mfc_ctrl.c @@ -0,0 +1,343 @@ +/* + * linux/drivers/media/video/s5p-mfc/s5p_mfc_ctrl.c + * + * Copyright (c) 2010 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * 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. + */ + +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/firmware.h> +#include <linux/jiffies.h> +#include <linux/sched.h> +#include "regs-mfc.h" +#include "s5p_mfc_cmd.h" +#include "s5p_mfc_common.h" +#include "s5p_mfc_debug.h" +#include "s5p_mfc_intr.h" +#include "s5p_mfc_pm.h" + +static void *s5p_mfc_bitproc_buf; +static size_t s5p_mfc_bitproc_phys; +static unsigned char *s5p_mfc_bitproc_virt; + +/* Allocate and load firmware */ +int s5p_mfc_alloc_and_load_firmware(struct s5p_mfc_dev *dev) +{ + struct firmware *fw_blob; + size_t bank2_base_phys; + void *b_base; + int err; + + /* Firmare has to be present as a separate file or compiled + * into kernel. */ + mfc_debug_enter(); + err = request_firmware((const struct firmware **)&fw_blob, + "s5pc110-mfc.fw", dev->v4l2_dev.dev); + if (err != 0) { + mfc_err("Firmware is not present in the /lib/firmware directory nor compiled in kernel\n"); + return -EINVAL; + } + dev->fw_size = ALIGN(fw_blob->size, FIRMWARE_ALIGN); + if (s5p_mfc_bitproc_buf) { + mfc_err("Attempting to allocate firmware when it seems that it is already loaded\n"); + release_firmware(fw_blob); + return -ENOMEM; + } + s5p_mfc_bitproc_buf = vb2_dma_contig_memops.alloc( + dev->alloc_ctx[MFC_BANK1_ALLOC_CTX], dev->fw_size); + if (IS_ERR(s5p_mfc_bitproc_buf)) { + s5p_mfc_bitproc_buf = 0; + mfc_err("Allocating bitprocessor buffer failed\n"); + release_firmware(fw_blob); + return -ENOMEM; + } + s5p_mfc_bitproc_phys = s5p_mfc_mem_cookie( + dev->alloc_ctx[MFC_BANK1_ALLOC_CTX], s5p_mfc_bitproc_buf); + if (s5p_mfc_bitproc_phys & ((1 << MFC_BASE_ALIGN_ORDER) - 1)) { + mfc_err("The base memory for bank 1 is not aligned to 128KB\n"); + vb2_dma_contig_memops.put(s5p_mfc_bitproc_buf); + s5p_mfc_bitproc_phys = 0; + s5p_mfc_bitproc_buf = 0; + release_firmware(fw_blob); + return -EIO; + } + s5p_mfc_bitproc_virt = vb2_dma_contig_memops.vaddr(s5p_mfc_bitproc_buf); + if (!s5p_mfc_bitproc_virt) { + mfc_err("Bitprocessor memory remap failed\n"); + vb2_dma_contig_memops.put(s5p_mfc_bitproc_buf); + s5p_mfc_bitproc_phys = 0; + s5p_mfc_bitproc_buf = 0; + release_firmware(fw_blob); + return -EIO; + } + dev->bank1 = s5p_mfc_bitproc_phys; + b_base = vb2_dma_contig_memops.alloc( + dev->alloc_ctx[MFC_BANK2_ALLOC_CTX], 1 << MFC_BANK2_ALIGN_ORDER); + if (IS_ERR(b_base)) { + vb2_dma_contig_memops.put(s5p_mfc_bitproc_buf); + s5p_mfc_bitproc_phys = 0; + s5p_mfc_bitproc_buf = 0; + mfc_err("Allocating bank2 base failed\n"); + release_firmware(fw_blob); + return -ENOMEM; + } + bank2_base_phys = s5p_mfc_mem_cookie( + dev->alloc_ctx[MFC_BANK2_ALLOC_CTX], b_base); + vb2_dma_contig_memops.put(b_base); + if (bank2_base_phys & ((1 << MFC_BASE_ALIGN_ORDER) - 1)) { + mfc_err("The base memory for bank 2 is not aligned to 128KB\n"); + vb2_dma_contig_memops.put(s5p_mfc_bitproc_buf); + s5p_mfc_bitproc_phys = 0; + s5p_mfc_bitproc_buf = 0; + release_firmware(fw_blob); + return -EIO; + } + dev->bank2 = bank2_base_phys; + memcpy(s5p_mfc_bitproc_virt, fw_blob->data, fw_blob->size); + wmb(); + release_firmware(fw_blob); + mfc_debug_leave(); + return 0; +} + +/* Reload firmware to MFC */ +int s5p_mfc_reload_firmware(struct s5p_mfc_dev *dev) +{ + struct firmware *fw_blob; + int err; + + /* Firmare has to be present as a separate file or compiled + * into kernel. */ + mfc_debug_enter(); + err = request_firmware((const struct firmware **)&fw_blob, + "s5pc110-mfc.fw", dev->v4l2_dev.dev); + if (err != 0) { + mfc_err("Firmware is not present in the /lib/firmware directory nor compiled in kernel\n"); + return -EINVAL; + } + if (fw_blob->size > dev->fw_size) { + mfc_err("MFC firmware is too big to be loaded\n"); + release_firmware(fw_blob); + return -ENOMEM; + } + if (s5p_mfc_bitproc_buf == 0 || s5p_mfc_bitproc_phys == 0) { + mfc_err("MFC firmware is not allocated or was not mapped correctly\n"); + release_firmware(fw_blob); + return -EINVAL; + } + memcpy(s5p_mfc_bitproc_virt, fw_blob->data, fw_blob->size); + wmb(); + release_firmware(fw_blob); + mfc_debug_leave(); + return 0; +} + +/* Release firmware memory */ +int s5p_mfc_release_firmware(struct s5p_mfc_dev *dev) +{ + /* Before calling this function one has to make sure + * that MFC is no longer processing */ + if (!s5p_mfc_bitproc_buf) + return -EINVAL; + vb2_dma_contig_memops.put(s5p_mfc_bitproc_buf); + s5p_mfc_bitproc_virt = 0; + s5p_mfc_bitproc_phys = 0; + s5p_mfc_bitproc_buf = 0; + return 0; +} + +/* Reset the device */ +int s5p_mfc_reset(struct s5p_mfc_dev *dev) +{ + unsigned int mc_status; + unsigned long timeout; + + mfc_debug_enter(); + /* Stop procedure */ + /* reset RISC */ + mfc_write(dev, 0x3f6, S5P_FIMV_SW_RESET); + /* All reset except for MC */ + mfc_write(dev, 0x3e2, S5P_FIMV_SW_RESET); + mdelay(10); + + timeout = jiffies + msecs_to_jiffies(MFC_BW_TIMEOUT); + /* Check MC status */ + do { + if (time_after(jiffies, timeout)) { + mfc_err("Timeout while resetting MFC\n"); + return -EIO; + } + + mc_status = mfc_read(dev, S5P_FIMV_MC_STATUS); + + } while (mc_status & 0x3); + + mfc_write(dev, 0x0, S5P_FIMV_SW_RESET); + mfc_write(dev, 0x3fe, S5P_FIMV_SW_RESET); + mfc_debug_leave(); + return 0; +} + +static inline void s5p_mfc_init_memctrl(struct s5p_mfc_dev *dev) +{ + mfc_write(dev, dev->bank1, S5P_FIMV_MC_DRAMBASE_ADR_A); + mfc_write(dev, dev->bank2, S5P_FIMV_MC_DRAMBASE_ADR_B); + mfc_debug(2, "Bank1: %08x, Bank2: %08x\n", dev->bank1, dev->bank2); +} + +static inline void s5p_mfc_clear_cmds(struct s5p_mfc_dev *dev) +{ + mfc_write(dev, 0xffffffff, S5P_FIMV_SI_CH0_INST_ID); + mfc_write(dev, 0xffffffff, S5P_FIMV_SI_CH1_INST_ID); + mfc_write(dev, 0, S5P_FIMV_RISC2HOST_CMD); + mfc_write(dev, 0, S5P_FIMV_HOST2RISC_CMD); +} + +/* Initialize hardware */ +int s5p_mfc_init_hw(struct s5p_mfc_dev *dev) +{ + unsigned int ver; + int ret; + + mfc_debug_enter(); + if (!s5p_mfc_bitproc_buf) + return -EINVAL; + + /* 0. MFC reset */ + mfc_debug(2, "MFC reset..\n"); + s5p_mfc_clock_on(); + ret = s5p_mfc_reset(dev); + if (ret) { + mfc_err("Failed to reset MFC - timeout\n"); + return ret; + } + mfc_debug(2, "Done MFC reset..\n"); + /* 1. Set DRAM base Addr */ + s5p_mfc_init_memctrl(dev); + /* 2. Initialize registers of channel I/F */ + s5p_mfc_clear_cmds(dev); + /* 3. Release reset signal to the RISC */ + s5p_mfc_clean_dev_int_flags(dev); + mfc_write(dev, 0x3ff, S5P_FIMV_SW_RESET); + mfc_debug(2, "Will now wait for completion of firmware transfer\n"); + if (s5p_mfc_wait_for_done_dev(dev, S5P_FIMV_R2H_CMD_FW_STATUS_RET)) { + mfc_err("Failed to load firmware\n"); + s5p_mfc_reset(dev); + s5p_mfc_clock_off(); + return -EIO; + } + s5p_mfc_clean_dev_int_flags(dev); + /* 4. Initialize firmware */ + ret = s5p_mfc_sys_init_cmd(dev); + if (ret) { + mfc_err("Failed to send command to MFC - timeout\n"); + s5p_mfc_reset(dev); + s5p_mfc_clock_off(); + return ret; + } + mfc_debug(2, "Ok, now will write a command to init the system\n"); + if (s5p_mfc_wait_for_done_dev(dev, S5P_FIMV_R2H_CMD_SYS_INIT_RET)) { + mfc_err("Failed to load firmware\n"); + s5p_mfc_reset(dev); + s5p_mfc_clock_off(); + return -EIO; + } + dev->int_cond = 0; + if (dev->int_err != 0 || dev->int_type != + S5P_FIMV_R2H_CMD_SYS_INIT_RET) { + /* Failure. */ + mfc_err("Failed to init firmware - error: %d int: %d\n", + dev->int_err, dev->int_type); + s5p_mfc_reset(dev); + s5p_mfc_clock_off(); + return -EIO; + } + ver = mfc_read(dev, S5P_FIMV_FW_VERSION); + mfc_debug(2, "MFC F/W version : %02xyy, %02xmm, %02xdd\n", + (ver >> 16) & 0xFF, (ver >> 8) & 0xFF, ver & 0xFF); + s5p_mfc_clock_off(); + mfc_debug_leave(); + return 0; +} + + +int s5p_mfc_sleep(struct s5p_mfc_dev *dev) +{ + int ret; + + mfc_debug_enter(); + s5p_mfc_clock_on(); + s5p_mfc_clean_dev_int_flags(dev); + ret = s5p_mfc_sleep_cmd(dev); + if (ret) { + mfc_err("Failed to send command to MFC - timeout\n"); + return ret; + } + if (s5p_mfc_wait_for_done_dev(dev, S5P_FIMV_R2H_CMD_SLEEP_RET)) { + mfc_err("Failed to sleep\n"); + return -EIO; + } + s5p_mfc_clock_off(); + dev->int_cond = 0; + if (dev->int_err != 0 || dev->int_type != + S5P_FIMV_R2H_CMD_SLEEP_RET) { + /* Failure. */ + mfc_err("Failed to sleep - error: %d int: %d\n", dev->int_err, + dev->int_type); + return -EIO; + } + mfc_debug_leave(); + return ret; +} + +int s5p_mfc_wakeup(struct s5p_mfc_dev *dev) +{ + int ret; + + mfc_debug_enter(); + /* 0. MFC reset */ + mfc_debug(2, "MFC reset..\n"); + s5p_mfc_clock_on(); + ret = s5p_mfc_reset(dev); + if (ret) { + mfc_err("Failed to reset MFC - timeout\n"); + return ret; + } + mfc_debug(2, "Done MFC reset..\n"); + /* 1. Set DRAM base Addr */ + s5p_mfc_init_memctrl(dev); + /* 2. Initialize registers of channel I/F */ + s5p_mfc_clear_cmds(dev); + s5p_mfc_clean_dev_int_flags(dev); + /* 3. Initialize firmware */ + ret = s5p_mfc_wakeup_cmd(dev); + if (ret) { + mfc_err("Failed to send command to MFC - timeout\n"); + return ret; + } + /* 4. Release reset signal to the RISC */ + mfc_write(dev, 0x3ff, S5P_FIMV_SW_RESET); + mfc_debug(2, "Ok, now will write a command to wakeup the system\n"); + if (s5p_mfc_wait_for_done_dev(dev, S5P_FIMV_R2H_CMD_WAKEUP_RET)) { + mfc_err("Failed to load firmware\n"); + return -EIO; + } + s5p_mfc_clock_off(); + dev->int_cond = 0; + if (dev->int_err != 0 || dev->int_type != + S5P_FIMV_R2H_CMD_WAKEUP_RET) { + /* Failure. */ + mfc_err("Failed to wakeup - error: %d int: %d\n", dev->int_err, + dev->int_type); + return -EIO; + } + mfc_debug_leave(); + return 0; +} + |