[PATCH v4 5/5] ARM: ep93xx: ts72xx: Add support for BK3 board - ts72xx derivative

From: Lukasz Majewski
Date: Thu Nov 30 2017 - 18:52:14 EST

The BK3 board is a derivative of the ts72xx reference design.

Signed-off-by: Lukasz Majewski <lukma@xxxxxxx>
---
Changes for v2:
- Place bk3 support code to the ts72xx.c file
Changes for v3:
- Add SD card support (via SPI) for BK3
- Remove definition of apb:i2s bus
- Remove board registration of CPLD WDT device
- Add I2S platform device to BK3
- Add MAINTAINERS entry for BK3 maintainer
Changes for v4:
- Adjust the code to be applicable on top of linux-next/master
---
MAINTAINERS | 6 ++
arch/arm/mach-ep93xx/Kconfig | 7 ++
arch/arm/mach-ep93xx/ts72xx.c | 146 ++++++++++++++++++++++++++++++++++++++++++
arch/arm/mach-ep93xx/ts72xx.h | 5 ++
arch/arm/tools/mach-types | 1 +
5 files changed, 165 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 4149cd992825..2fc98b40268d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1254,6 +1254,12 @@ L: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx (moderated for non-subscribers)
S: Supported
F: drivers/net/ethernet/cavium/thunder/

+ARM/CIRRUS LOGIC BK3 MACHINE SUPPORT
+M: Lukasz Majewski <lukma@xxxxxxx>
+L: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/mach-ep93xx/ts72xx.c
+
ARM/CIRRUS LOGIC CLPS711X ARM ARCHITECTURE
M: Alexander Shiyan <shc_work@xxxxxxx>
L: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx (moderated for non-subscribers)
diff --git a/arch/arm/mach-ep93xx/Kconfig b/arch/arm/mach-ep93xx/Kconfig
index 61a75ca3684e..c095236d7ff8 100644
--- a/arch/arm/mach-ep93xx/Kconfig
+++ b/arch/arm/mach-ep93xx/Kconfig
@@ -21,6 +21,13 @@ config MACH_ADSSPHERE
Say 'Y' here if you want your kernel to support the ADS
Sphere board.

+config MACH_BK3
+ bool "Support Liebherr BK3.1"
+ select MACH_TS72XX
+ help
+ Say 'Y' here if you want your kernel to support the
+ Liebherr controller BK3.1.
+
config MACH_EDB93XX
bool

diff --git a/arch/arm/mach-ep93xx/ts72xx.c b/arch/arm/mach-ep93xx/ts72xx.c
index cf269b5397e5..de3be5e3bee7 100644
--- a/arch/arm/mach-ep93xx/ts72xx.c
+++ b/arch/arm/mach-ep93xx/ts72xx.c
@@ -19,10 +19,15 @@
#include <linux/mtd/rawnand.h>
#include <linux/mtd/partitions.h>
#include <linux/spi/spi.h>
+#include <linux/spi/flash.h>
+#include <linux/spi/mmc_spi.h>
+#include <linux/mmc/host.h>
#include <linux/platform_data/spi-ep93xx.h>

#include <mach/gpio-ep93xx.h>
#include <mach/hardware.h>
+#include <mach/irqs.h>
+#include <mach/gpio-ep93xx.h>

#include <asm/mach-types.h>
#include <asm/mach/map.h>
@@ -221,6 +226,69 @@ static struct ep93xx_eth_data __initdata ts72xx_eth_data = {
};

/*************************************************************************
+ * SPI SD/MMC host
+ *************************************************************************/
+#define BK3_EN_SDCARD_PHYS_BASE 0x12400000
+#define BK3_EN_SDCARD_PWR 0x0
+#define BK3_DIS_SDCARD_PWR 0x0C
+static void bk3_mmc_spi_setpower(struct device *dev, unsigned int vdd)
+{
+ void __iomem *pwr_sd = ioremap(BK3_EN_SDCARD_PHYS_BASE, SZ_4K);
+
+ if (!pwr_sd) {
+ pr_err("Failed to enable SD card power!");
+ return;
+ }
+
+ pr_debug("%s: SD card pwr %s VDD:0x%x\n", __func__,
+ !!vdd ? "ON" : "OFF", vdd);
+
+ if (!!vdd)
+ __raw_writeb(BK3_EN_SDCARD_PWR, pwr_sd);
+ else
+ __raw_writeb(BK3_DIS_SDCARD_PWR, pwr_sd);
+
+ iounmap(pwr_sd);
+}
+
+static struct mmc_spi_platform_data bk3_spi_mmc_data = {
+ .detect_delay = 500,
+ .powerup_msecs = 100,
+ .ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34,
+ .caps = MMC_CAP_NONREMOVABLE,
+ .setpower = bk3_mmc_spi_setpower,
+};
+
+/*************************************************************************
+ * SPI Bus - SD card access
+ *************************************************************************/
+static struct spi_board_info bk3_spi_board_info[] __initdata = {
+ {
+ .modalias = "mmc_spi",
+ .platform_data = &bk3_spi_mmc_data,
+ .max_speed_hz = 7.4E6,
+ .bus_num = 0,
+ .chip_select = 0,
+ .mode = SPI_MODE_0,
+ },
+};
+
+/*
+ * This is a stub -> the FGPIO[3] pin is not connected on the schematic
+ * The all work is performed automatically by !SPI_FRAME (SFRM1) and
+ * goes through CPLD
+ */
+static int bk3_spi_chipselects[] __initdata = {
+ EP93XX_GPIO_LINE_F(3),
+};
+
+static struct ep93xx_spi_info bk3_spi_master __initdata = {
+ .chipselect = bk3_spi_chipselects,
+ .num_chipselect = ARRAY_SIZE(bk3_spi_chipselects),
+ .use_dma = 1,
+};
+
+/*************************************************************************
* TS72XX support code
*************************************************************************/
#if IS_ENABLED(CONFIG_FPGA_MGR_TS73XX)
@@ -294,3 +362,81 @@ MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")
.init_late = ep93xx_init_late,
.restart = ep93xx_restart,
MACHINE_END
+
+/*************************************************************************
+ * EP93xx I2S audio peripheral handling
+ *************************************************************************/
+static struct resource ep93xx_i2s_resource[] = {
+ DEFINE_RES_MEM(EP93XX_I2S_PHYS_BASE, 0x100),
+ DEFINE_RES_IRQ_NAMED(IRQ_EP93XX_SAI, "spilink i2s slave"),
+};
+
+static struct platform_device ep93xx_i2s_device = {
+ .name = "ep93xx-spilink-i2s",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(ep93xx_i2s_resource),
+ .resource = ep93xx_i2s_resource,
+};
+
+/*************************************************************************
+ * BK3 support code
+ *************************************************************************/
+static struct mtd_partition bk3_nand_parts[] = {
+ {
+ .name = "System",
+ .offset = 0x00000000,
+ .size = 0x01e00000,
+ }, {
+ .name = "Data",
+ .offset = 0x01e00000,
+ .size = 0x05f20000
+ }, {
+ .name = "RedBoot",
+ .offset = 0x07d20000,
+ .size = 0x002e0000,
+ .mask_flags = MTD_WRITEABLE, /* force RO */
+ },
+};
+
+static struct map_desc bk3_io_desc[] __initdata = {
+ {
+ .virtual = BK3_CPLDVER_VIRT_BASE,
+ .pfn = __phys_to_pfn(BK3_CPLDVER_PHYS_BASE),
+ .length = BK3_CPLDVER_SIZE,
+ .type = MT_DEVICE,
+ }
+};
+
+static void __init bk3_map_io(void)
+{
+ ts72xx_common_map_io();
+ iotable_init(bk3_io_desc, ARRAY_SIZE(bk3_io_desc));
+}
+
+static void __init bk3_init_machine(void)
+{
+ ep93xx_init_devices();
+
+ ts72xx_register_flash(bk3_nand_parts, ARRAY_SIZE(bk3_nand_parts),
+ EP93XX_CS6_PHYS_BASE);
+
+ ep93xx_register_eth(&ts72xx_eth_data, 1);
+
+ ep93xx_register_spi(&bk3_spi_master, bk3_spi_board_info,
+ ARRAY_SIZE(bk3_spi_board_info));
+
+ /* Configure ep93xx's I2S to use AC97 pins */
+ ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
+ platform_device_register(&ep93xx_i2s_device);
+}
+
+MACHINE_START(BK3, "Liebherr controller BK3.1")
+ /* Maintainer: Lukasz Majewski <lukma@xxxxxxx> */
+ .atag_offset = 0x100,
+ .map_io = bk3_map_io,
+ .init_irq = ep93xx_init_irq,
+ .init_time = ep93xx_timer_init,
+ .init_machine = bk3_init_machine,
+ .init_late = ep93xx_init_late,
+ .restart = ep93xx_restart,
+MACHINE_END
diff --git a/arch/arm/mach-ep93xx/ts72xx.h b/arch/arm/mach-ep93xx/ts72xx.h
index 7b7490f10fa9..61410faa3785 100644
--- a/arch/arm/mach-ep93xx/ts72xx.h
+++ b/arch/arm/mach-ep93xx/ts72xx.h
@@ -42,6 +42,11 @@
#define TS72XX_OPTIONS2_TS9420 0x04
#define TS72XX_OPTIONS2_TS9420_BOOT 0x02

+/* BK3 specific defines */
+#define BK3_CPLDVER_PHYS_BASE 0x23400000
+#define BK3_CPLDVER_VIRT_BASE 0xfebfd000
+#define BK3_CPLDVER_SIZE 0x00001000
+
#ifndef __ASSEMBLY__

static inline int ts72xx_model(void)
diff --git a/arch/arm/tools/mach-types b/arch/arm/tools/mach-types
index a9313b66f770..4eac94c1eb6f 100644
--- a/arch/arm/tools/mach-types
+++ b/arch/arm/tools/mach-types
@@ -345,6 +345,7 @@ mxlads MACH_MXLADS MXLADS 1851
linkstation_mini MACH_LINKSTATION_MINI LINKSTATION_MINI 1858
afeb9260 MACH_AFEB9260 AFEB9260 1859
imx27ipcam MACH_IMX27IPCAM IMX27IPCAM 1871
+bk3 MACH_BK3 BK3 1880
rd88f6183ap_ge MACH_RD88F6183AP_GE RD88F6183AP_GE 1894
realview_pba8 MACH_REALVIEW_PBA8 REALVIEW_PBA8 1897
realview_pbx MACH_REALVIEW_PBX REALVIEW_PBX 1901
--
2.11.0