^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Versatile board support using the device tree
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2010 Secret Lab Technologies Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2009 Jeremy Kerr <jeremy.kerr@canonical.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2004 ARM Limited
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (C) 2000 Deep Blue Solutions Ltd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/of_address.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/of_irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/of_platform.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/amba/bus.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/amba/mmci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/mach-types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/mach/arch.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <asm/mach/map.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) /* macro to get at MMIO space when running virtually */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define IO_ADDRESS(x) (((x) & 0x0fffffff) + (((x) >> 4) & 0x0f000000) + 0xf0000000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define __io_address(n) ((void __iomem __force *)IO_ADDRESS(n))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * ------------------------------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * Versatile Registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * ------------------------------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define VERSATILE_SYS_PCICTL_OFFSET 0x44
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define VERSATILE_SYS_MCI_OFFSET 0x48
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * VERSATILE peripheral addresses
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define VERSATILE_MMCI0_BASE 0x10005000 /* MMC interface */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define VERSATILE_MMCI1_BASE 0x1000B000 /* MMC Interface */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define VERSATILE_SCTL_BASE 0x101E0000 /* System controller */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * System controller bit assignment
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define VERSATILE_REFCLK 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define VERSATILE_TIMCLK 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define VERSATILE_TIMER1_EnSel 15
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define VERSATILE_TIMER2_EnSel 17
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define VERSATILE_TIMER3_EnSel 19
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define VERSATILE_TIMER4_EnSel 21
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static void __iomem *versatile_sys_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) unsigned int mmc_status(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) struct amba_device *adev = container_of(dev, struct amba_device, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) u32 mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if (adev->res.start == VERSATILE_MMCI0_BASE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) mask = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) mask = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return readl(versatile_sys_base + VERSATILE_SYS_MCI_OFFSET) & mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static struct mmci_platform_data mmc0_plat_data = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) .status = mmc_status,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) static struct mmci_platform_data mmc1_plat_data = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) .status = mmc_status,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) * Lookup table for attaching a specific name and platform_data pointer to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) * devices as they get created by of_platform_populate(). Ideally this table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) * would not exist, but the current clock implementation depends on some devices
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * having a specific name.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct of_dev_auxdata versatile_auxdata_lookup[] __initdata = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) OF_DEV_AUXDATA("arm,primecell", VERSATILE_MMCI0_BASE, "fpga:05", &mmc0_plat_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) OF_DEV_AUXDATA("arm,primecell", VERSATILE_MMCI1_BASE, "fpga:0b", &mmc1_plat_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) static struct map_desc versatile_io_desc[] __initdata __maybe_unused = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) .virtual = IO_ADDRESS(VERSATILE_SCTL_BASE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .pfn = __phys_to_pfn(VERSATILE_SCTL_BASE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) .length = SZ_4K * 9,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) .type = MT_DEVICE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static void __init versatile_map_io(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) debug_ll_io_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) iotable_init(versatile_io_desc, ARRAY_SIZE(versatile_io_desc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static void __init versatile_init_early(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) u32 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) * set clock frequency:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) * VERSATILE_REFCLK is 32KHz
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) * VERSATILE_TIMCLK is 1MHz
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) val = readl(__io_address(VERSATILE_SCTL_BASE));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) writel((VERSATILE_TIMCLK << VERSATILE_TIMER1_EnSel) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) (VERSATILE_TIMCLK << VERSATILE_TIMER2_EnSel) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) (VERSATILE_TIMCLK << VERSATILE_TIMER3_EnSel) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) (VERSATILE_TIMCLK << VERSATILE_TIMER4_EnSel) | val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) __io_address(VERSATILE_SCTL_BASE));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static void __init versatile_dt_pci_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) u32 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) struct device_node *np;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) struct property *newprop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) np = of_find_compatible_node(NULL, NULL, "arm,versatile-pci");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (!np)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) /* Check if PCI backplane is detected */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) val = readl(versatile_sys_base + VERSATILE_SYS_PCICTL_OFFSET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if (val & 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) * Enable PCI accesses. Note that the documentaton is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) * inconsistent whether or not this is needed, but the old
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) * driver had it so we will keep it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) writel(1, versatile_sys_base + VERSATILE_SYS_PCICTL_OFFSET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) goto out_put_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) newprop = kzalloc(sizeof(*newprop), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) if (!newprop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) goto out_put_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) newprop->name = kstrdup("status", GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) newprop->value = kstrdup("disabled", GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) newprop->length = sizeof("disabled");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) of_update_property(np, newprop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) pr_info("Not plugged into PCI backplane!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) out_put_node:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) of_node_put(np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) static void __init versatile_dt_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) struct device_node *np;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) np = of_find_compatible_node(NULL, NULL, "arm,core-module-versatile");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) if (np)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) versatile_sys_base = of_iomap(np, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) WARN_ON(!versatile_sys_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) versatile_dt_pci_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) of_platform_default_populate(NULL, versatile_auxdata_lookup, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) static const char *const versatile_dt_match[] __initconst = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) "arm,versatile-ab",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) "arm,versatile-pb",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) DT_MACHINE_START(VERSATILE_PB, "ARM-Versatile (Device Tree Support)")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) .map_io = versatile_map_io,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) .init_early = versatile_init_early,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) .init_machine = versatile_dt_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) .dt_compat = versatile_dt_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) MACHINE_END
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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