83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
133 lines
3.1 KiB
C
133 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2013 Broadcom Corporation.
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*/
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#include <common.h>
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#include <malloc.h>
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#include <sdhci.h>
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#include <linux/errno.h>
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#include <asm/kona-common/clk.h>
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#define SDHCI_CORECTRL_OFFSET 0x00008000
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#define SDHCI_CORECTRL_EN 0x01
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#define SDHCI_CORECTRL_RESET 0x02
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#define SDHCI_CORESTAT_OFFSET 0x00008004
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#define SDHCI_CORESTAT_CD_SW 0x01
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#define SDHCI_COREIMR_OFFSET 0x00008008
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#define SDHCI_COREIMR_IP 0x01
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static int init_kona_mmc_core(struct sdhci_host *host)
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{
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unsigned int mask;
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unsigned int timeout;
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if (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & SDHCI_RESET_ALL) {
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printf("%s: sd host controller reset error\n", __func__);
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return -EBUSY;
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}
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/* For kona a hardware reset before anything else. */
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mask = sdhci_readl(host, SDHCI_CORECTRL_OFFSET) | SDHCI_CORECTRL_RESET;
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sdhci_writel(host, mask, SDHCI_CORECTRL_OFFSET);
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/* Wait max 100 ms */
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timeout = 1000;
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do {
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if (timeout == 0) {
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printf("%s: reset timeout error\n", __func__);
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return -ETIMEDOUT;
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}
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timeout--;
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udelay(100);
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} while (0 ==
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(sdhci_readl(host, SDHCI_CORECTRL_OFFSET) &
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SDHCI_CORECTRL_RESET));
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/* Clear the reset bit. */
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mask = mask & ~SDHCI_CORECTRL_RESET;
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sdhci_writel(host, mask, SDHCI_CORECTRL_OFFSET);
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/* Enable AHB clock */
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mask = sdhci_readl(host, SDHCI_CORECTRL_OFFSET);
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sdhci_writel(host, mask | SDHCI_CORECTRL_EN, SDHCI_CORECTRL_OFFSET);
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/* Enable interrupts */
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sdhci_writel(host, SDHCI_COREIMR_IP, SDHCI_COREIMR_OFFSET);
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/* Make sure Card is detected in controller */
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mask = sdhci_readl(host, SDHCI_CORESTAT_OFFSET);
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sdhci_writel(host, mask | SDHCI_CORESTAT_CD_SW, SDHCI_CORESTAT_OFFSET);
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/* Wait max 100 ms */
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timeout = 1000;
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while (!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
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if (timeout == 0) {
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printf("%s: CARD DETECT timeout error\n", __func__);
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return -ETIMEDOUT;
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}
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timeout--;
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udelay(100);
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}
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return 0;
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}
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int kona_sdhci_init(int dev_index, u32 min_clk, u32 quirks)
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{
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int ret = 0;
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u32 max_clk;
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void *reg_base;
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struct sdhci_host *host = NULL;
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host = (struct sdhci_host *)malloc(sizeof(struct sdhci_host));
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if (!host) {
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printf("%s: sdhci host malloc fail!\n", __func__);
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return -ENOMEM;
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}
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switch (dev_index) {
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case 0:
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reg_base = (void *)CONFIG_SYS_SDIO_BASE0;
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ret = clk_sdio_enable(reg_base, CONFIG_SYS_SDIO0_MAX_CLK,
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&max_clk);
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break;
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case 1:
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reg_base = (void *)CONFIG_SYS_SDIO_BASE1;
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ret = clk_sdio_enable(reg_base, CONFIG_SYS_SDIO1_MAX_CLK,
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&max_clk);
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break;
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case 2:
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reg_base = (void *)CONFIG_SYS_SDIO_BASE2;
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ret = clk_sdio_enable(reg_base, CONFIG_SYS_SDIO2_MAX_CLK,
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&max_clk);
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break;
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case 3:
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reg_base = (void *)CONFIG_SYS_SDIO_BASE3;
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ret = clk_sdio_enable(reg_base, CONFIG_SYS_SDIO3_MAX_CLK,
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&max_clk);
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break;
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default:
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printf("%s: sdio dev index %d not supported\n",
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__func__, dev_index);
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ret = -EINVAL;
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}
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if (ret) {
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free(host);
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return ret;
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}
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host->name = "kona-sdhci";
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host->ioaddr = reg_base;
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host->quirks = quirks;
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host->max_clk = max_clk;
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if (init_kona_mmc_core(host)) {
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free(host);
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return -EINVAL;
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}
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add_sdhci(host, 0, min_clk);
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return ret;
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}
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