mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-19 11:18:28 +00:00
c5c1af2176
To add the DesignWare MMC driver support for Altera SOCFPGA. It required information such as clocks and bus width from platform specific files (SOCFPGA handoff files) Signed-off-by: Chin Liang See <clsee@altera.com> Cc: Rajeshwari Shinde <rajeshwari.s@samsung.com> Cc: Jaehoon Chung <jh80.chung@samsung.com> Cc: Pantelis Antoniou <panto@antoniou-consulting.com> Cc: Wolfgang Denk <wd@denx.de> Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
/*
|
|
* (C) Copyright 2013 Altera Corporation <www.altera.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <malloc.h>
|
|
#include <dwmmc.h>
|
|
#include <asm/arch/dwmmc.h>
|
|
#include <asm/arch/clock_manager.h>
|
|
#include <asm/arch/system_manager.h>
|
|
|
|
static const struct socfpga_clock_manager *clock_manager_base =
|
|
(void *)SOCFPGA_CLKMGR_ADDRESS;
|
|
static const struct socfpga_system_manager *system_manager_base =
|
|
(void *)SOCFPGA_SYSMGR_ADDRESS;
|
|
|
|
static char *SOCFPGA_NAME = "SOCFPGA DWMMC";
|
|
|
|
static void socfpga_dwmci_clksel(struct dwmci_host *host)
|
|
{
|
|
unsigned int drvsel;
|
|
unsigned int smplsel;
|
|
|
|
/* Disable SDMMC clock. */
|
|
clrbits_le32(&clock_manager_base->per_pll_en,
|
|
CLKMGR_PERPLLGRP_EN_SDMMCCLK_MASK);
|
|
|
|
/* Configures drv_sel and smpl_sel */
|
|
drvsel = CONFIG_SOCFPGA_DWMMC_DRVSEL;
|
|
smplsel = CONFIG_SOCFPGA_DWMMC_SMPSEL;
|
|
|
|
debug("%s: drvsel %d smplsel %d\n", __func__, drvsel, smplsel);
|
|
writel(SYSMGR_SDMMC_CTRL_SET(smplsel, drvsel),
|
|
&system_manager_base->sdmmcgrp_ctrl);
|
|
|
|
debug("%s: SYSMGR_SDMMCGRP_CTRL_REG = 0x%x\n", __func__,
|
|
readl(&system_manager_base->sdmmcgrp_ctrl));
|
|
|
|
/* Enable SDMMC clock */
|
|
setbits_le32(&clock_manager_base->per_pll_en,
|
|
CLKMGR_PERPLLGRP_EN_SDMMCCLK_MASK);
|
|
}
|
|
|
|
int socfpga_dwmmc_init(u32 regbase, int bus_width, int index)
|
|
{
|
|
struct dwmci_host *host = NULL;
|
|
host = calloc(sizeof(struct dwmci_host), 1);
|
|
if (!host) {
|
|
printf("dwmci_host calloc fail!\n");
|
|
return -1;
|
|
}
|
|
|
|
host->name = SOCFPGA_NAME;
|
|
host->ioaddr = (void *)regbase;
|
|
host->buswidth = bus_width;
|
|
host->clksel = socfpga_dwmci_clksel;
|
|
host->dev_index = index;
|
|
/* fixed clock divide by 4 which due to the SDMMC wrapper */
|
|
host->bus_hz = CONFIG_SOCFPGA_DWMMC_BUS_HZ;
|
|
host->fifoth_val = MSIZE(0x2) |
|
|
RX_WMARK(CONFIG_SOCFPGA_DWMMC_FIFO_DEPTH / 2 - 1) |
|
|
TX_WMARK(CONFIG_SOCFPGA_DWMMC_FIFO_DEPTH / 2);
|
|
|
|
return add_dwmci(host, host->bus_hz, 400000);
|
|
}
|
|
|