| Chin Liang See | c5c1af2 | 2013-12-30 18:26:14 -0600 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2013 Altera Corporation <www.altera.com> |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0+ |
| 5 | */ |
| 6 | |
| 7 | #include <common.h> |
| 8 | #include <malloc.h> |
| 9 | #include <dwmmc.h> |
| 10 | #include <asm/arch/dwmmc.h> |
| 11 | #include <asm/arch/clock_manager.h> |
| 12 | #include <asm/arch/system_manager.h> |
| 13 | |
| 14 | static const struct socfpga_clock_manager *clock_manager_base = |
| 15 | (void *)SOCFPGA_CLKMGR_ADDRESS; |
| 16 | static const struct socfpga_system_manager *system_manager_base = |
| 17 | (void *)SOCFPGA_SYSMGR_ADDRESS; |
| 18 | |
| 19 | static char *SOCFPGA_NAME = "SOCFPGA DWMMC"; |
| 20 | |
| 21 | static void socfpga_dwmci_clksel(struct dwmci_host *host) |
| 22 | { |
| 23 | unsigned int drvsel; |
| 24 | unsigned int smplsel; |
| 25 | |
| 26 | /* Disable SDMMC clock. */ |
| 27 | clrbits_le32(&clock_manager_base->per_pll_en, |
| 28 | CLKMGR_PERPLLGRP_EN_SDMMCCLK_MASK); |
| 29 | |
| 30 | /* Configures drv_sel and smpl_sel */ |
| 31 | drvsel = CONFIG_SOCFPGA_DWMMC_DRVSEL; |
| 32 | smplsel = CONFIG_SOCFPGA_DWMMC_SMPSEL; |
| 33 | |
| 34 | debug("%s: drvsel %d smplsel %d\n", __func__, drvsel, smplsel); |
| 35 | writel(SYSMGR_SDMMC_CTRL_SET(smplsel, drvsel), |
| 36 | &system_manager_base->sdmmcgrp_ctrl); |
| 37 | |
| 38 | debug("%s: SYSMGR_SDMMCGRP_CTRL_REG = 0x%x\n", __func__, |
| 39 | readl(&system_manager_base->sdmmcgrp_ctrl)); |
| 40 | |
| 41 | /* Enable SDMMC clock */ |
| 42 | setbits_le32(&clock_manager_base->per_pll_en, |
| 43 | CLKMGR_PERPLLGRP_EN_SDMMCCLK_MASK); |
| 44 | } |
| 45 | |
| 46 | int socfpga_dwmmc_init(u32 regbase, int bus_width, int index) |
| 47 | { |
| 48 | struct dwmci_host *host = NULL; |
| 49 | host = calloc(sizeof(struct dwmci_host), 1); |
| 50 | if (!host) { |
| 51 | printf("dwmci_host calloc fail!\n"); |
| 52 | return -1; |
| 53 | } |
| 54 | |
| 55 | host->name = SOCFPGA_NAME; |
| 56 | host->ioaddr = (void *)regbase; |
| 57 | host->buswidth = bus_width; |
| 58 | host->clksel = socfpga_dwmci_clksel; |
| 59 | host->dev_index = index; |
| 60 | /* fixed clock divide by 4 which due to the SDMMC wrapper */ |
| 61 | host->bus_hz = CONFIG_SOCFPGA_DWMMC_BUS_HZ; |
| 62 | host->fifoth_val = MSIZE(0x2) | |
| 63 | RX_WMARK(CONFIG_SOCFPGA_DWMMC_FIFO_DEPTH / 2 - 1) | |
| 64 | TX_WMARK(CONFIG_SOCFPGA_DWMMC_FIFO_DEPTH / 2); |
| 65 | |
| 66 | return add_dwmci(host, host->bus_hz, 400000); |
| 67 | } |
| 68 | |