1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #include <console/console.h>
4 #include <commonlib/sd_mmc_ctrlr.h>
5 #include <commonlib/sdhci.h>
6 #include <commonlib/storage/sdhci.h>
7 #include <delay.h>
8 #include <soc/sdhci_msm.h>
9
10 /*
11 * msm specific SDHC initialization. This is ported from depthcharge's
12 * sdhci_msm_init().
13 */
sdhci_msm_init(struct sdhci_ctrlr * host)14 static int sdhci_msm_init(struct sdhci_ctrlr *host)
15 {
16 uint32_t vendor_caps = 0;
17
18 printk(BIOS_INFO, "Initializing SDHCI MSM host controller!\n");
19
20 /* Read host controller capabilities */
21 vendor_caps = sdhci_readl(host, SDHCI_CAPABILITIES);
22
23 /*
24 * Explicitly enable the capabilities which are not advertised
25 * by default
26 */
27 vendor_caps |= SDHCI_CAN_VDD_180 | SDHCI_CAN_DO_8BIT;
28
29 /*
30 * Update internal capabilities register so that these updated values
31 * will get reflected in SDHCI_CAPABILITEIS register.
32 */
33 sdhci_writel(host, vendor_caps, SDCC_HC_VENDOR_SPECIFIC_CAPABILITIES0);
34
35 /*
36 * Reset the vendor spec register to power on reset state.
37 * This is to ensure that this register is set to right value
38 * incase if this register get updated by bootrom when using SDHCI boot.
39 */
40 sdhci_writel(host, VENDOR_SPEC_FUN3_POR_VAL,
41 SDCC_HC_VENDOR_SPECIFIC_FUNC3);
42
43 /*
44 * Set SD power off, otherwise reset will result in pwr irq.
45 * And without setting bus off status, reset would fail.
46 */
47 sdhci_writeb(host, 0x0, SDHCI_POWER_CONTROL);
48 udelay(10);
49
50 return 0;
51 }
52
53
54 /*
55 * This function is a wrapper around new_mem_sdhci_controller(). It initializes
56 * the pre_init callback function to sdhci_msm_init(), which takes care of any
57 * msm initialization before the actual sdhci initialization is executed.
58 */
new_sdhci_msm_host(void * ioaddr)59 struct sd_mmc_ctrlr *new_sdhci_msm_host(void *ioaddr)
60 {
61 struct sd_mmc_ctrlr *host;
62
63 host = new_mem_sdhci_controller(ioaddr, sdhci_msm_init);
64 if (host == NULL)
65 printk(BIOS_ERR, "Error initializing SDHCI MSM host controller!\n");
66
67 return host;
68 }
69