| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Tomer Maimon | 3848 | 97.76% | 2 | 13.33% |
| Herve Codina via Alsa-devel | 50 | 1.27% | 1 | 6.67% |
| Yang Yingliang | 12 | 0.30% | 2 | 13.33% |
| William A. Kennington III | 8 | 0.20% | 1 | 6.67% |
| Jonathan Neuschäfer | 4 | 0.10% | 1 | 6.67% |
| Andy Shevchenko | 3 | 0.08% | 1 | 6.67% |
| Chi Minghao | 3 | 0.08% | 1 | 6.67% |
| Uwe Kleine-König | 2 | 0.05% | 1 | 6.67% |
| Li Zetao | 2 | 0.05% | 1 | 6.67% |
| Rob Herring | 1 | 0.03% | 1 | 6.67% |
| Colin Ian King | 1 | 0.03% | 1 | 6.67% |
| AceLan Kao | 1 | 0.03% | 1 | 6.67% |
| Christoph Hellwig | 1 | 0.03% | 1 | 6.67% |
| Total | 3936 | 15 |
// SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2019 Nuvoton Technology corporation. #include <linux/bits.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/device.h> #include <linux/module.h> #include <linux/ioport.h> #include <linux/clk.h> #include <linux/platform_device.h> #include <linux/io.h> #include <linux/vmalloc.h> #include <linux/regmap.h> #include <linux/of.h> #include <linux/spi/spi-mem.h> #include <linux/mfd/syscon.h> /* NPCM7xx GCR module */ #define NPCM7XX_INTCR3_OFFSET 0x9C #define NPCM7XX_INTCR3_FIU_FIX BIT(6) /* Flash Interface Unit (FIU) Registers */ #define NPCM_FIU_DRD_CFG 0x00 #define NPCM_FIU_DWR_CFG 0x04 #define NPCM_FIU_UMA_CFG 0x08 #define NPCM_FIU_UMA_CTS 0x0C #define NPCM_FIU_UMA_CMD 0x10 #define NPCM_FIU_UMA_ADDR 0x14 #define NPCM_FIU_PRT_CFG 0x18 #define NPCM_FIU_UMA_DW0 0x20 #define NPCM_FIU_UMA_DW1 0x24 #define NPCM_FIU_UMA_DW2 0x28 #define NPCM_FIU_UMA_DW3 0x2C #define NPCM_FIU_UMA_DR0 0x30 #define NPCM_FIU_UMA_DR1 0x34 #define NPCM_FIU_UMA_DR2 0x38 #define NPCM_FIU_UMA_DR3 0x3C #define NPCM_FIU_CFG 0x78 #define NPCM_FIU_MAX_REG_LIMIT 0x80 /* FIU Direct Read Configuration Register */ #define NPCM_FIU_DRD_CFG_LCK BIT(31) #define NPCM_FIU_DRD_CFG_R_BURST GENMASK(25, 24) #define NPCM_FIU_DRD_CFG_ADDSIZ GENMASK(17, 16) #define NPCM_FIU_DRD_CFG_DBW GENMASK(13, 12) #define NPCM_FIU_DRD_CFG_ACCTYPE GENMASK(9, 8) #define NPCM_FIU_DRD_CFG_RDCMD GENMASK(7, 0) #define NPCM_FIU_DRD_ADDSIZ_SHIFT 16 #define NPCM_FIU_DRD_DBW_SHIFT 12 #define NPCM_FIU_DRD_ACCTYPE_SHIFT 8 /* FIU Direct Write Configuration Register */ #define NPCM_FIU_DWR_CFG_LCK BIT(31) #define NPCM_FIU_DWR_CFG_W_BURST GENMASK(25, 24) #define NPCM_FIU_DWR_CFG_ADDSIZ GENMASK(17, 16) #define NPCM_FIU_DWR_CFG_ABPCK GENMASK(11, 10) #define NPCM_FIU_DWR_CFG_DBPCK GENMASK(9, 8) #define NPCM_FIU_DWR_CFG_WRCMD GENMASK(7, 0) #define NPCM_FIU_DWR_ADDSIZ_SHIFT 16 #define NPCM_FIU_DWR_ABPCK_SHIFT 10 #define NPCM_FIU_DWR_DBPCK_SHIFT 8 /* FIU UMA Configuration Register */ #define NPCM_FIU_UMA_CFG_LCK BIT(31) #define NPCM_FIU_UMA_CFG_CMMLCK BIT(30) #define NPCM_FIU_UMA_CFG_RDATSIZ GENMASK(28, 24) #define NPCM_FIU_UMA_CFG_DBSIZ GENMASK(23, 21) #define NPCM_FIU_UMA_CFG_WDATSIZ GENMASK(20, 16) #define NPCM_FIU_UMA_CFG_ADDSIZ GENMASK(13, 11) #define NPCM_FIU_UMA_CFG_CMDSIZ BIT(10) #define NPCM_FIU_UMA_CFG_RDBPCK GENMASK(9, 8) #define NPCM_FIU_UMA_CFG_DBPCK GENMASK(7, 6) #define NPCM_FIU_UMA_CFG_WDBPCK GENMASK(5, 4) #define NPCM_FIU_UMA_CFG_ADBPCK GENMASK(3, 2) #define NPCM_FIU_UMA_CFG_CMBPCK GENMASK(1, 0) #define NPCM_FIU_UMA_CFG_ADBPCK_SHIFT 2 #define NPCM_FIU_UMA_CFG_WDBPCK_SHIFT 4 #define NPCM_FIU_UMA_CFG_DBPCK_SHIFT 6 #define NPCM_FIU_UMA_CFG_RDBPCK_SHIFT 8 #define NPCM_FIU_UMA_CFG_ADDSIZ_SHIFT 11 #define NPCM_FIU_UMA_CFG_WDATSIZ_SHIFT 16 #define NPCM_FIU_UMA_CFG_DBSIZ_SHIFT 21 #define NPCM_FIU_UMA_CFG_RDATSIZ_SHIFT 24 /* FIU UMA Control and Status Register */ #define NPCM_FIU_UMA_CTS_RDYIE BIT(25) #define NPCM_FIU_UMA_CTS_RDYST BIT(24) #define NPCM_FIU_UMA_CTS_SW_CS BIT(16) #define NPCM_FIU_UMA_CTS_DEV_NUM GENMASK(9, 8) #define NPCM_FIU_UMA_CTS_EXEC_DONE BIT(0) #define NPCM_FIU_UMA_CTS_DEV_NUM_SHIFT 8 /* FIU UMA Command Register */ #define NPCM_FIU_UMA_CMD_DUM3 GENMASK(31, 24) #define NPCM_FIU_UMA_CMD_DUM2 GENMASK(23, 16) #define NPCM_FIU_UMA_CMD_DUM1 GENMASK(15, 8) #define NPCM_FIU_UMA_CMD_CMD GENMASK(7, 0) /* FIU UMA Address Register */ #define NPCM_FIU_UMA_ADDR_UMA_ADDR GENMASK(31, 0) #define NPCM_FIU_UMA_ADDR_AB3 GENMASK(31, 24) #define NPCM_FIU_UMA_ADDR_AB2 GENMASK(23, 16) #define NPCM_FIU_UMA_ADDR_AB1 GENMASK(15, 8) #define NPCM_FIU_UMA_ADDR_AB0 GENMASK(7, 0) /* FIU UMA Write Data Bytes 0-3 Register */ #define NPCM_FIU_UMA_DW0_WB3 GENMASK(31, 24) #define NPCM_FIU_UMA_DW0_WB2 GENMASK(23, 16) #define NPCM_FIU_UMA_DW0_WB1 GENMASK(15, 8) #define NPCM_FIU_UMA_DW0_WB0 GENMASK(7, 0) /* FIU UMA Write Data Bytes 4-7 Register */ #define NPCM_FIU_UMA_DW1_WB7 GENMASK(31, 24) #define NPCM_FIU_UMA_DW1_WB6 GENMASK(23, 16) #define NPCM_FIU_UMA_DW1_WB5 GENMASK(15, 8) #define NPCM_FIU_UMA_DW1_WB4 GENMASK(7, 0) /* FIU UMA Write Data Bytes 8-11 Register */ #define NPCM_FIU_UMA_DW2_WB11 GENMASK(31, 24) #define NPCM_FIU_UMA_DW2_WB10 GENMASK(23, 16) #define NPCM_FIU_UMA_DW2_WB9 GENMASK(15, 8) #define NPCM_FIU_UMA_DW2_WB8 GENMASK(7, 0) /* FIU UMA Write Data Bytes 12-15 Register */ #define NPCM_FIU_UMA_DW3_WB15 GENMASK(31, 24) #define NPCM_FIU_UMA_DW3_WB14 GENMASK(23, 16) #define NPCM_FIU_UMA_DW3_WB13 GENMASK(15, 8) #define NPCM_FIU_UMA_DW3_WB12 GENMASK(7, 0) /* FIU UMA Read Data Bytes 0-3 Register */ #define NPCM_FIU_UMA_DR0_RB3 GENMASK(31, 24) #define NPCM_FIU_UMA_DR0_RB2 GENMASK(23, 16) #define NPCM_FIU_UMA_DR0_RB1 GENMASK(15, 8) #define NPCM_FIU_UMA_DR0_RB0 GENMASK(7, 0) /* FIU UMA Read Data Bytes 4-7 Register */ #define NPCM_FIU_UMA_DR1_RB15 GENMASK(31, 24) #define NPCM_FIU_UMA_DR1_RB14 GENMASK(23, 16) #define NPCM_FIU_UMA_DR1_RB13 GENMASK(15, 8) #define NPCM_FIU_UMA_DR1_RB12 GENMASK(7, 0) /* FIU UMA Read Data Bytes 8-11 Register */ #define NPCM_FIU_UMA_DR2_RB15 GENMASK(31, 24) #define NPCM_FIU_UMA_DR2_RB14 GENMASK(23, 16) #define NPCM_FIU_UMA_DR2_RB13 GENMASK(15, 8) #define NPCM_FIU_UMA_DR2_RB12 GENMASK(7, 0) /* FIU UMA Read Data Bytes 12-15 Register */ #define NPCM_FIU_UMA_DR3_RB15 GENMASK(31, 24) #define NPCM_FIU_UMA_DR3_RB14 GENMASK(23, 16) #define NPCM_FIU_UMA_DR3_RB13 GENMASK(15, 8) #define NPCM_FIU_UMA_DR3_RB12 GENMASK(7, 0) /* FIU Configuration Register */ #define NPCM_FIU_CFG_FIU_FIX BIT(31) /* FIU Read Mode */ enum { DRD_SINGLE_WIRE_MODE = 0, DRD_DUAL_IO_MODE = 1, DRD_QUAD_IO_MODE = 2, DRD_SPI_X_MODE = 3, }; enum { DWR_ABPCK_BIT_PER_CLK = 0, DWR_ABPCK_2_BIT_PER_CLK = 1, DWR_ABPCK_4_BIT_PER_CLK = 2, }; enum { DWR_DBPCK_BIT_PER_CLK = 0, DWR_DBPCK_2_BIT_PER_CLK = 1, DWR_DBPCK_4_BIT_PER_CLK = 2, }; #define NPCM_FIU_DRD_16_BYTE_BURST 0x3000000 #define NPCM_FIU_DWR_16_BYTE_BURST 0x3000000 #define MAP_SIZE_128MB 0x8000000 #define MAP_SIZE_16MB 0x1000000 #define MAP_SIZE_8MB 0x800000 #define FIU_DRD_MAX_DUMMY_NUMBER 3 #define NPCM_MAX_CHIP_NUM 4 #define CHUNK_SIZE 16 #define UMA_MICRO_SEC_TIMEOUT 150 enum { FIU0 = 0, FIU3, FIUX, FIU1, }; struct npcm_fiu_info { char *name; u32 fiu_id; u32 max_map_size; u32 max_cs; }; struct fiu_data { const struct npcm_fiu_info *npcm_fiu_data_info; int fiu_max; }; static const struct npcm_fiu_info npcm7xx_fiu_info[] = { {.name = "FIU0", .fiu_id = FIU0, .max_map_size = MAP_SIZE_128MB, .max_cs = 2}, {.name = "FIU3", .fiu_id = FIU3, .max_map_size = MAP_SIZE_128MB, .max_cs = 4}, {.name = "FIUX", .fiu_id = FIUX, .max_map_size = MAP_SIZE_16MB, .max_cs = 2} }; static const struct fiu_data npcm7xx_fiu_data = { .npcm_fiu_data_info = npcm7xx_fiu_info, .fiu_max = 3, }; static const struct npcm_fiu_info npxm8xx_fiu_info[] = { {.name = "FIU0", .fiu_id = FIU0, .max_map_size = MAP_SIZE_128MB, .max_cs = 2}, {.name = "FIU3", .fiu_id = FIU3, .max_map_size = MAP_SIZE_128MB, .max_cs = 4}, {.name = "FIUX", .fiu_id = FIUX, .max_map_size = MAP_SIZE_16MB, .max_cs = 2}, {.name = "FIU1", .fiu_id = FIU1, .max_map_size = MAP_SIZE_16MB, .max_cs = 4} }; static const struct fiu_data npxm8xx_fiu_data = { .npcm_fiu_data_info = npxm8xx_fiu_info, .fiu_max = 4, }; struct npcm_fiu_spi; struct npcm_fiu_chip { void __iomem *flash_region_mapped_ptr; struct npcm_fiu_spi *fiu; unsigned long clkrate; u32 chipselect; }; struct npcm_fiu_spi { struct npcm_fiu_chip chip[NPCM_MAX_CHIP_NUM]; const struct npcm_fiu_info *info; struct spi_mem_op drd_op; struct resource *res_mem; struct regmap *regmap; unsigned long clkrate; struct device *dev; struct clk *clk; bool spix_mode; }; static const struct regmap_config npcm_mtd_regmap_config = { .reg_bits = 32, .val_bits = 32, .reg_stride = 4, .max_register = NPCM_FIU_MAX_REG_LIMIT, }; static void npcm_fiu_set_drd(struct npcm_fiu_spi *fiu, const struct spi_mem_op *op) { regmap_update_bits(fiu->regmap, NPCM_FIU_DRD_CFG, NPCM_FIU_DRD_CFG_ACCTYPE, ilog2(op->addr.buswidth) << NPCM_FIU_DRD_ACCTYPE_SHIFT); fiu->drd_op.addr.buswidth = op->addr.buswidth; regmap_update_bits(fiu->regmap, NPCM_FIU_DRD_CFG, NPCM_FIU_DRD_CFG_DBW, op->dummy.nbytes << NPCM_FIU_DRD_DBW_SHIFT); fiu->drd_op.dummy.nbytes = op->dummy.nbytes; regmap_update_bits(fiu->regmap, NPCM_FIU_DRD_CFG, NPCM_FIU_DRD_CFG_RDCMD, op->cmd.opcode); fiu->drd_op.cmd.opcode = op->cmd.opcode; regmap_update_bits(fiu->regmap, NPCM_FIU_DRD_CFG, NPCM_FIU_DRD_CFG_ADDSIZ, (op->addr.nbytes - 3) << NPCM_FIU_DRD_ADDSIZ_SHIFT); fiu->drd_op.addr.nbytes = op->addr.nbytes; } static ssize_t npcm_fiu_direct_read(struct spi_mem_dirmap_desc *desc, u64 offs, size_t len, void *buf) { struct npcm_fiu_spi *fiu = spi_controller_get_devdata(desc->mem->spi->controller); struct npcm_fiu_chip *chip = &fiu->chip[spi_get_chipselect(desc->mem->spi, 0)]; void __iomem *src = (void __iomem *)(chip->flash_region_mapped_ptr + offs); u8 *buf_rx = buf; u32 i; if (fiu->spix_mode) { for (i = 0 ; i < len ; i++) *(buf_rx + i) = ioread8(src + i); } else { if (desc->info.op_tmpl.addr.buswidth != fiu->drd_op.addr.buswidth || desc->info.op_tmpl.dummy.nbytes != fiu->drd_op.dummy.nbytes || desc->info.op_tmpl.cmd.opcode != fiu->drd_op.cmd.opcode || desc->info.op_tmpl.addr.nbytes != fiu->drd_op.addr.nbytes) npcm_fiu_set_drd(fiu, &desc->info.op_tmpl); memcpy_fromio(buf_rx, src, len); } return len; } static ssize_t npcm_fiu_direct_write(struct spi_mem_dirmap_desc *desc, u64 offs, size_t len, const void *buf) { struct npcm_fiu_spi *fiu = spi_controller_get_devdata(desc->mem->spi->controller); struct npcm_fiu_chip *chip = &fiu->chip[spi_get_chipselect(desc->mem->spi, 0)]; void __iomem *dst = (void __iomem *)(chip->flash_region_mapped_ptr + offs); const u8 *buf_tx = buf; u32 i; if (fiu->spix_mode) for (i = 0 ; i < len ; i++) iowrite8(*(buf_tx + i), dst + i); else memcpy_toio(dst, buf_tx, len); return len; } static int npcm_fiu_uma_read(struct spi_mem *mem, const struct spi_mem_op *op, u32 addr, bool is_address_size, u8 *data, u32 data_size) { struct npcm_fiu_spi *fiu = spi_controller_get_devdata(mem->spi->controller); u32 uma_cfg = BIT(10); u32 data_reg[4]; int ret; u32 val; u32 i; regmap_update_bits(fiu->regmap, NPCM_FIU_UMA_CTS, NPCM_FIU_UMA_CTS_DEV_NUM, (spi_get_chipselect(mem->spi, 0) << NPCM_FIU_UMA_CTS_DEV_NUM_SHIFT)); regmap_update_bits(fiu->regmap, NPCM_FIU_UMA_CMD, NPCM_FIU_UMA_CMD_CMD, op->cmd.opcode); if (is_address_size) { uma_cfg |= ilog2(op->cmd.buswidth); uma_cfg |= ilog2(op->addr.buswidth) << NPCM_FIU_UMA_CFG_ADBPCK_SHIFT; if (op->dummy.nbytes) uma_cfg |= ilog2(op->dummy.buswidth) << NPCM_FIU_UMA_CFG_DBPCK_SHIFT; uma_cfg |= ilog2(op->data.buswidth) << NPCM_FIU_UMA_CFG_RDBPCK_SHIFT; uma_cfg |= op->dummy.nbytes << NPCM_FIU_UMA_CFG_DBSIZ_SHIFT; uma_cfg |= op->addr.nbytes << NPCM_FIU_UMA_CFG_ADDSIZ_SHIFT; regmap_write(fiu->regmap, NPCM_FIU_UMA_ADDR, addr); } else { regmap_write(fiu->regmap, NPCM_FIU_UMA_ADDR, 0x0); } uma_cfg |= data_size << NPCM_FIU_UMA_CFG_RDATSIZ_SHIFT; regmap_write(fiu->regmap, NPCM_FIU_UMA_CFG, uma_cfg); regmap_write_bits(fiu->regmap, NPCM_FIU_UMA_CTS, NPCM_FIU_UMA_CTS_EXEC_DONE, NPCM_FIU_UMA_CTS_EXEC_DONE); ret = regmap_read_poll_timeout(fiu->regmap, NPCM_FIU_UMA_CTS, val, (!(val & NPCM_FIU_UMA_CTS_EXEC_DONE)), 0, UMA_MICRO_SEC_TIMEOUT); if (ret) return ret; if (data_size) { for (i = 0; i < DIV_ROUND_UP(data_size, 4); i++) regmap_read(fiu->regmap, NPCM_FIU_UMA_DR0 + (i * 4), &data_reg[i]); memcpy(data, data_reg, data_size); } return 0; } static int npcm_fiu_uma_write(struct spi_mem *mem, const struct spi_mem_op *op, u8 cmd, bool is_address_size, u8 *data, u32 data_size) { struct npcm_fiu_spi *fiu = spi_controller_get_devdata(mem->spi->controller); u32 uma_cfg = BIT(10); u32 data_reg[4] = {0}; u32 val; u32 i; regmap_update_bits(fiu->regmap, NPCM_FIU_UMA_CTS, NPCM_FIU_UMA_CTS_DEV_NUM, (spi_get_chipselect(mem->spi, 0) << NPCM_FIU_UMA_CTS_DEV_NUM_SHIFT)); regmap_update_bits(fiu->regmap, NPCM_FIU_UMA_CMD, NPCM_FIU_UMA_CMD_CMD, cmd); if (data_size) { memcpy(data_reg, data, data_size); for (i = 0; i < DIV_ROUND_UP(data_size, 4); i++) regmap_write(fiu->regmap, NPCM_FIU_UMA_DW0 + (i * 4), data_reg[i]); } if (is_address_size) { uma_cfg |= ilog2(op->cmd.buswidth); uma_cfg |= ilog2(op->addr.buswidth) << NPCM_FIU_UMA_CFG_ADBPCK_SHIFT; uma_cfg |= ilog2(op->data.buswidth) << NPCM_FIU_UMA_CFG_WDBPCK_SHIFT; uma_cfg |= op->addr.nbytes << NPCM_FIU_UMA_CFG_ADDSIZ_SHIFT; regmap_write(fiu->regmap, NPCM_FIU_UMA_ADDR, op->addr.val); } else { regmap_write(fiu->regmap, NPCM_FIU_UMA_ADDR, 0x0); } uma_cfg |= (data_size << NPCM_FIU_UMA_CFG_WDATSIZ_SHIFT); regmap_write(fiu->regmap, NPCM_FIU_UMA_CFG, uma_cfg); regmap_write_bits(fiu->regmap, NPCM_FIU_UMA_CTS, NPCM_FIU_UMA_CTS_EXEC_DONE, NPCM_FIU_UMA_CTS_EXEC_DONE); return regmap_read_poll_timeout(fiu->regmap, NPCM_FIU_UMA_CTS, val, (!(val & NPCM_FIU_UMA_CTS_EXEC_DONE)), 0, UMA_MICRO_SEC_TIMEOUT); } static int npcm_fiu_manualwrite(struct spi_mem *mem, const struct spi_mem_op *op) { struct npcm_fiu_spi *fiu = spi_controller_get_devdata(mem->spi->controller); u8 *data = (u8 *)op->data.buf.out; u32 num_data_chunks; u32 remain_data; u32 idx = 0; int ret; num_data_chunks = op->data.nbytes / CHUNK_SIZE; remain_data = op->data.nbytes % CHUNK_SIZE; regmap_update_bits(fiu->regmap, NPCM_FIU_UMA_CTS, NPCM_FIU_UMA_CTS_DEV_NUM, (spi_get_chipselect(mem->spi, 0) << NPCM_FIU_UMA_CTS_DEV_NUM_SHIFT)); regmap_update_bits(fiu->regmap, NPCM_FIU_UMA_CTS, NPCM_FIU_UMA_CTS_SW_CS, 0); ret = npcm_fiu_uma_write(mem, op, op->cmd.opcode, true, NULL, 0); if (ret) return ret; /* Starting the data writing loop in multiples of 8 */ for (idx = 0; idx < num_data_chunks; ++idx) { ret = npcm_fiu_uma_write(mem, op, data[0], false, &data[1], CHUNK_SIZE - 1); if (ret) return ret; data += CHUNK_SIZE; } /* Handling chunk remains */ if (remain_data > 0) { ret = npcm_fiu_uma_write(mem, op, data[0], false, &data[1], remain_data - 1); if (ret) return ret; } regmap_update_bits(fiu->regmap, NPCM_FIU_UMA_CTS, NPCM_FIU_UMA_CTS_SW_CS, NPCM_FIU_UMA_CTS_SW_CS); return 0; } static int npcm_fiu_read(struct spi_mem *mem, const struct spi_mem_op *op) { u8 *data = op->data.buf.in; int i, readlen, currlen; u8 *buf_ptr; u32 addr; int ret; i = 0; currlen = op->data.nbytes; do { addr = ((u32)op->addr.val + i); if (currlen < 16) readlen = currlen; else readlen = 16; buf_ptr = data + i; ret = npcm_fiu_uma_read(mem, op, addr, true, buf_ptr, readlen); if (ret) return ret; i += readlen; currlen -= 16; } while (currlen > 0); return 0; } static void npcm_fiux_set_direct_wr(struct npcm_fiu_spi *fiu) { regmap_write(fiu->regmap, NPCM_FIU_DWR_CFG, NPCM_FIU_DWR_16_BYTE_BURST); regmap_update_bits(fiu->regmap, NPCM_FIU_DWR_CFG, NPCM_FIU_DWR_CFG_ABPCK, DWR_ABPCK_4_BIT_PER_CLK << NPCM_FIU_DWR_ABPCK_SHIFT); regmap_update_bits(fiu->regmap, NPCM_FIU_DWR_CFG, NPCM_FIU_DWR_CFG_DBPCK, DWR_DBPCK_4_BIT_PER_CLK << NPCM_FIU_DWR_DBPCK_SHIFT); } static void npcm_fiux_set_direct_rd(struct npcm_fiu_spi *fiu) { u32 rx_dummy = 0; regmap_write(fiu->regmap, NPCM_FIU_DRD_CFG, NPCM_FIU_DRD_16_BYTE_BURST); regmap_update_bits(fiu->regmap, NPCM_FIU_DRD_CFG, NPCM_FIU_DRD_CFG_ACCTYPE, DRD_SPI_X_MODE << NPCM_FIU_DRD_ACCTYPE_SHIFT); regmap_update_bits(fiu->regmap, NPCM_FIU_DRD_CFG, NPCM_FIU_DRD_CFG_DBW, rx_dummy << NPCM_FIU_DRD_DBW_SHIFT); } static int npcm_fiu_exec_op(struct spi_mem *mem, const struct spi_mem_op *op) { struct npcm_fiu_spi *fiu = spi_controller_get_devdata(mem->spi->controller); struct npcm_fiu_chip *chip = &fiu->chip[spi_get_chipselect(mem->spi, 0)]; int ret = 0; u8 *buf; dev_dbg(fiu->dev, "cmd:%#x mode:%d.%d.%d.%d addr:%#llx len:%#x\n", op->cmd.opcode, op->cmd.buswidth, op->addr.buswidth, op->dummy.buswidth, op->data.buswidth, op->addr.val, op->data.nbytes); if (fiu->spix_mode || op->addr.nbytes > 4) return -EOPNOTSUPP; if (fiu->clkrate != chip->clkrate) { ret = clk_set_rate(fiu->clk, chip->clkrate); if (ret < 0) dev_warn(fiu->dev, "Failed setting %lu frequency, stay at %lu frequency\n", chip->clkrate, fiu->clkrate); else fiu->clkrate = chip->clkrate; } if (op->data.dir == SPI_MEM_DATA_IN) { if (!op->addr.nbytes) { buf = op->data.buf.in; ret = npcm_fiu_uma_read(mem, op, op->addr.val, false, buf, op->data.nbytes); } else { ret = npcm_fiu_read(mem, op); } } else { if (!op->addr.nbytes && !op->data.nbytes) ret = npcm_fiu_uma_write(mem, op, op->cmd.opcode, false, NULL, 0); if (op->addr.nbytes && !op->data.nbytes) { int i; u8 buf_addr[4]; u32 addr = op->addr.val; for (i = op->addr.nbytes - 1; i >= 0; i--) { buf_addr[i] = addr & 0xff; addr >>= 8; } ret = npcm_fiu_uma_write(mem, op, op->cmd.opcode, false, buf_addr, op->addr.nbytes); } if (!op->addr.nbytes && op->data.nbytes) ret = npcm_fiu_uma_write(mem, op, op->cmd.opcode, false, (u8 *)op->data.buf.out, op->data.nbytes); if (op->addr.nbytes && op->data.nbytes) ret = npcm_fiu_manualwrite(mem, op); } return ret; } static int npcm_fiu_dirmap_create(struct spi_mem_dirmap_desc *desc) { struct npcm_fiu_spi *fiu = spi_controller_get_devdata(desc->mem->spi->controller); struct npcm_fiu_chip *chip = &fiu->chip[spi_get_chipselect(desc->mem->spi, 0)]; struct regmap *gcr_regmap; if (!fiu->res_mem) { dev_warn(fiu->dev, "Reserved memory not defined, direct read disabled\n"); desc->nodirmap = true; return 0; } if (!fiu->spix_mode && desc->info.op_tmpl.data.dir == SPI_MEM_DATA_OUT) { desc->nodirmap = true; return 0; } if (!chip->flash_region_mapped_ptr) { chip->flash_region_mapped_ptr = devm_ioremap(fiu->dev, (fiu->res_mem->start + (fiu->info->max_map_size * spi_get_chipselect(desc->mem->spi, 0))), (u32)desc->info.length); if (!chip->flash_region_mapped_ptr) { dev_warn(fiu->dev, "Error mapping memory region, direct read disabled\n"); desc->nodirmap = true; return 0; } } if (of_device_is_compatible(fiu->dev->of_node, "nuvoton,npcm750-fiu")) { gcr_regmap = syscon_regmap_lookup_by_compatible("nuvoton,npcm750-gcr"); if (IS_ERR(gcr_regmap)) { dev_warn(fiu->dev, "Didn't find nuvoton,npcm750-gcr, direct read disabled\n"); desc->nodirmap = true; return 0; } regmap_update_bits(gcr_regmap, NPCM7XX_INTCR3_OFFSET, NPCM7XX_INTCR3_FIU_FIX, NPCM7XX_INTCR3_FIU_FIX); } else { regmap_update_bits(fiu->regmap, NPCM_FIU_CFG, NPCM_FIU_CFG_FIU_FIX, NPCM_FIU_CFG_FIU_FIX); } if (desc->info.op_tmpl.data.dir == SPI_MEM_DATA_IN) { if (!fiu->spix_mode) npcm_fiu_set_drd(fiu, &desc->info.op_tmpl); else npcm_fiux_set_direct_rd(fiu); } else { npcm_fiux_set_direct_wr(fiu); } return 0; } static int npcm_fiu_setup(struct spi_device *spi) { struct spi_controller *ctrl = spi->controller; struct npcm_fiu_spi *fiu = spi_controller_get_devdata(ctrl); struct npcm_fiu_chip *chip; chip = &fiu->chip[spi_get_chipselect(spi, 0)]; chip->fiu = fiu; chip->chipselect = spi_get_chipselect(spi, 0); chip->clkrate = spi->max_speed_hz; fiu->clkrate = clk_get_rate(fiu->clk); return 0; } static const struct spi_controller_mem_ops npcm_fiu_mem_ops = { .exec_op = npcm_fiu_exec_op, .dirmap_create = npcm_fiu_dirmap_create, .dirmap_read = npcm_fiu_direct_read, .dirmap_write = npcm_fiu_direct_write, }; static const struct of_device_id npcm_fiu_dt_ids[] = { { .compatible = "nuvoton,npcm750-fiu", .data = &npcm7xx_fiu_data }, { .compatible = "nuvoton,npcm845-fiu", .data = &npxm8xx_fiu_data }, { /* sentinel */ } }; static int npcm_fiu_probe(struct platform_device *pdev) { const struct fiu_data *fiu_data_match; struct device *dev = &pdev->dev; struct spi_controller *ctrl; struct npcm_fiu_spi *fiu; void __iomem *regbase; int id; ctrl = devm_spi_alloc_host(dev, sizeof(*fiu)); if (!ctrl) return -ENOMEM; fiu = spi_controller_get_devdata(ctrl); fiu_data_match = of_device_get_match_data(dev); if (!fiu_data_match) { dev_err(dev, "No compatible OF match\n"); return -ENODEV; } id = of_alias_get_id(dev->of_node, "fiu"); if (id < 0 || id >= fiu_data_match->fiu_max) { dev_err(dev, "Invalid platform device id: %d\n", id); return -EINVAL; } fiu->info = &fiu_data_match->npcm_fiu_data_info[id]; platform_set_drvdata(pdev, fiu); fiu->dev = dev; regbase = devm_platform_ioremap_resource_byname(pdev, "control"); if (IS_ERR(regbase)) return PTR_ERR(regbase); fiu->regmap = devm_regmap_init_mmio(dev, regbase, &npcm_mtd_regmap_config); if (IS_ERR(fiu->regmap)) { dev_err(dev, "Failed to create regmap\n"); return PTR_ERR(fiu->regmap); } fiu->res_mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "memory"); fiu->clk = devm_clk_get_enabled(dev, NULL); if (IS_ERR(fiu->clk)) return PTR_ERR(fiu->clk); fiu->spix_mode = of_property_read_bool(dev->of_node, "nuvoton,spix-mode"); platform_set_drvdata(pdev, fiu); ctrl->mode_bits = SPI_RX_DUAL | SPI_RX_QUAD | SPI_TX_DUAL | SPI_TX_QUAD; ctrl->setup = npcm_fiu_setup; ctrl->bus_num = -1; ctrl->mem_ops = &npcm_fiu_mem_ops; ctrl->num_chipselect = fiu->info->max_cs; ctrl->dev.of_node = dev->of_node; return devm_spi_register_controller(dev, ctrl); } static void npcm_fiu_remove(struct platform_device *pdev) { } MODULE_DEVICE_TABLE(of, npcm_fiu_dt_ids); static struct platform_driver npcm_fiu_driver = { .driver = { .name = "NPCM-FIU", .bus = &platform_bus_type, .of_match_table = npcm_fiu_dt_ids, }, .probe = npcm_fiu_probe, .remove_new = npcm_fiu_remove, }; module_platform_driver(npcm_fiu_driver); MODULE_DESCRIPTION("Nuvoton FLASH Interface Unit SPI Controller Driver"); MODULE_AUTHOR("Tomer Maimon <tomer.maimon@nuvoton.com>"); MODULE_LICENSE("GPL v2");
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