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-rw-r--r--arch/arm/mach-u300/Kconfig2
-rw-r--r--arch/arm/mach-u300/Makefile2
-rw-r--r--arch/arm/mach-u300/core.c84
-rw-r--r--arch/arm/mach-u300/include/mach/syscon.h136
-rw-r--r--arch/arm/mach-u300/mmc.c16
-rw-r--r--arch/arm/mach-u300/padmux.c367
-rw-r--r--arch/arm/mach-u300/padmux.h39
-rw-r--r--arch/arm/mach-u300/spi.c20
8 files changed, 85 insertions, 581 deletions
diff --git a/arch/arm/mach-u300/Kconfig b/arch/arm/mach-u300/Kconfig
index 32a7b0f7e9f..449fd6a8dbd 100644
--- a/arch/arm/mach-u300/Kconfig
+++ b/arch/arm/mach-u300/Kconfig
@@ -6,6 +6,8 @@ comment "ST-Ericsson Mobile Platform Products"
6 6
7config MACH_U300 7config MACH_U300
8 bool "U300" 8 bool "U300"
9 select PINCTRL
10 select PINMUX_U300
9 11
10comment "ST-Ericsson U300/U330/U335/U365 Feature Selections" 12comment "ST-Ericsson U300/U330/U335/U365 Feature Selections"
11 13
diff --git a/arch/arm/mach-u300/Makefile b/arch/arm/mach-u300/Makefile
index 8fd354aaf0a..285538124e5 100644
--- a/arch/arm/mach-u300/Makefile
+++ b/arch/arm/mach-u300/Makefile
@@ -2,7 +2,7 @@
2# Makefile for the linux kernel, U300 machine. 2# Makefile for the linux kernel, U300 machine.
3# 3#
4 4
5obj-y := core.o clock.o timer.o padmux.o 5obj-y := core.o clock.o timer.o
6obj-m := 6obj-m :=
7obj-n := 7obj-n :=
8obj- := 8obj- :=
diff --git a/arch/arm/mach-u300/core.c b/arch/arm/mach-u300/core.c
index 399c89f14df..2f5929bdeaa 100644
--- a/arch/arm/mach-u300/core.c
+++ b/arch/arm/mach-u300/core.c
@@ -25,6 +25,8 @@
25#include <linux/err.h> 25#include <linux/err.h>
26#include <linux/mtd/nand.h> 26#include <linux/mtd/nand.h>
27#include <linux/mtd/fsmc.h> 27#include <linux/mtd/fsmc.h>
28#include <linux/pinctrl/machine.h>
29#include <linux/pinctrl/pinmux.h>
28 30
29#include <asm/types.h> 31#include <asm/types.h>
30#include <asm/setup.h> 32#include <asm/setup.h>
@@ -1535,6 +1537,14 @@ static struct coh901318_platform coh901318_platform = {
1535 .max_channels = U300_DMA_CHANNELS, 1537 .max_channels = U300_DMA_CHANNELS,
1536}; 1538};
1537 1539
1540static struct resource pinmux_resources[] = {
1541 {
1542 .start = U300_SYSCON_BASE,
1543 .end = U300_SYSCON_BASE + SZ_4K - 1,
1544 .flags = IORESOURCE_MEM,
1545 },
1546};
1547
1538static struct platform_device wdog_device = { 1548static struct platform_device wdog_device = {
1539 .name = "coh901327_wdog", 1549 .name = "coh901327_wdog",
1540 .id = -1, 1550 .id = -1,
@@ -1630,6 +1640,72 @@ static struct platform_device dma_device = {
1630 }, 1640 },
1631}; 1641};
1632 1642
1643static struct platform_device pinmux_device = {
1644 .name = "pinmux-u300",
1645 .id = -1,
1646 .num_resources = ARRAY_SIZE(pinmux_resources),
1647 .resource = pinmux_resources,
1648};
1649
1650/* Pinmux settings */
1651static struct pinmux_map u300_pinmux_map[] = {
1652 /* anonymous maps for chip power and EMIFs */
1653 PINMUX_MAP_PRIMARY_SYS_HOG("POWER", "power"),
1654 PINMUX_MAP_PRIMARY_SYS_HOG("EMIF0", "emif0"),
1655 PINMUX_MAP_PRIMARY_SYS_HOG("EMIF1", "emif1"),
1656 /* per-device maps for MMC/SD, SPI and UART */
1657 PINMUX_MAP_PRIMARY("MMCSD", "mmc0", "mmci"),
1658 PINMUX_MAP_PRIMARY("SPI", "spi0", "pl022"),
1659 PINMUX_MAP_PRIMARY("UART0", "uart0", "uart0"),
1660};
1661
1662struct u300_mux_hog {
1663 const char *name;
1664 struct device *dev;
1665 struct pinmux *pmx;
1666};
1667
1668static struct u300_mux_hog u300_mux_hogs[] = {
1669 {
1670 .name = "uart0",
1671 .dev = &uart0_device.dev,
1672 },
1673 {
1674 .name = "spi0",
1675 .dev = &pl022_device.dev,
1676 },
1677 {
1678 .name = "mmc0",
1679 .dev = &mmcsd_device.dev,
1680 },
1681};
1682
1683static int __init u300_pinmux_fetch(void)
1684{
1685 int i;
1686
1687 for (i = 0; i < ARRAY_SIZE(u300_mux_hogs); i++) {
1688 struct pinmux *pmx;
1689 int ret;
1690
1691 pmx = pinmux_get(u300_mux_hogs[i].dev, NULL);
1692 if (IS_ERR(pmx)) {
1693 pr_err("u300: could not get pinmux hog %s\n",
1694 u300_mux_hogs[i].name);
1695 continue;
1696 }
1697 ret = pinmux_enable(pmx);
1698 if (ret) {
1699 pr_err("u300: could enable pinmux hog %s\n",
1700 u300_mux_hogs[i].name);
1701 continue;
1702 }
1703 u300_mux_hogs[i].pmx = pmx;
1704 }
1705 return 0;
1706}
1707subsys_initcall(u300_pinmux_fetch);
1708
1633/* 1709/*
1634 * Notice that AMBA devices are initialized before platform devices. 1710 * Notice that AMBA devices are initialized before platform devices.
1635 * 1711 *
@@ -1643,10 +1719,10 @@ static struct platform_device *platform_devs[] __initdata = {
1643 &gpio_device, 1719 &gpio_device,
1644 &nand_device, 1720 &nand_device,
1645 &wdog_device, 1721 &wdog_device,
1646 &ave_device 1722 &ave_device,
1723 &pinmux_device,
1647}; 1724};
1648 1725
1649
1650/* 1726/*
1651 * Interrupts: the U300 platforms have two pl190 ARM PrimeCells connected 1727 * Interrupts: the U300 platforms have two pl190 ARM PrimeCells connected
1652 * together so some interrupts are connected to the first one and some 1728 * together so some interrupts are connected to the first one and some
@@ -1828,6 +1904,10 @@ void __init u300_init_devices(void)
1828 1904
1829 u300_assign_physmem(); 1905 u300_assign_physmem();
1830 1906
1907 /* Initialize pinmuxing */
1908 pinmux_register_mappings(u300_pinmux_map,
1909 ARRAY_SIZE(u300_pinmux_map));
1910
1831 /* Register subdevices on the I2C buses */ 1911 /* Register subdevices on the I2C buses */
1832 u300_i2c_register_board_devices(); 1912 u300_i2c_register_board_devices();
1833 1913
diff --git a/arch/arm/mach-u300/include/mach/syscon.h b/arch/arm/mach-u300/include/mach/syscon.h
index 7444f5c7da9..6e84f07a7c6 100644
--- a/arch/arm/mach-u300/include/mach/syscon.h
+++ b/arch/arm/mach-u300/include/mach/syscon.h
@@ -234,91 +234,6 @@
234#define U300_SYSCON_ECCR_EMIF_1_RET_OUT_CLK_EN_N_DISABLE (0x0004) 234#define U300_SYSCON_ECCR_EMIF_1_RET_OUT_CLK_EN_N_DISABLE (0x0004)
235#define U300_SYSCON_ECCR_EMIF_MEMCLK_RET_EN_N_DISABLE (0x0002) 235#define U300_SYSCON_ECCR_EMIF_MEMCLK_RET_EN_N_DISABLE (0x0002)
236#define U300_SYSCON_ECCR_EMIF_SDRCLK_RET_EN_N_DISABLE (0x0001) 236#define U300_SYSCON_ECCR_EMIF_SDRCLK_RET_EN_N_DISABLE (0x0001)
237/* PAD MUX Control register 1 (LOW) 16bit (R/W) */
238#define U300_SYSCON_PMC1LR (0x007C)
239#define U300_SYSCON_PMC1LR_MASK (0xFFFF)
240#define U300_SYSCON_PMC1LR_CDI_MASK (0xC000)
241#define U300_SYSCON_PMC1LR_CDI_CDI (0x0000)
242#define U300_SYSCON_PMC1LR_CDI_EMIF (0x4000)
243#ifdef CONFIG_MACH_U300_BS335
244#define U300_SYSCON_PMC1LR_CDI_CDI2 (0x8000)
245#define U300_SYSCON_PMC1LR_CDI_WCDMA_APP_GPIO (0xC000)
246#elif CONFIG_MACH_U300_BS365
247#define U300_SYSCON_PMC1LR_CDI_GPIO (0x8000)
248#define U300_SYSCON_PMC1LR_CDI_WCDMA (0xC000)
249#endif
250#define U300_SYSCON_PMC1LR_PDI_MASK (0x3000)
251#define U300_SYSCON_PMC1LR_PDI_PDI (0x0000)
252#define U300_SYSCON_PMC1LR_PDI_EGG (0x1000)
253#define U300_SYSCON_PMC1LR_PDI_WCDMA (0x3000)
254#define U300_SYSCON_PMC1LR_MMCSD_MASK (0x0C00)
255#define U300_SYSCON_PMC1LR_MMCSD_MMCSD (0x0000)
256#define U300_SYSCON_PMC1LR_MMCSD_MSPRO (0x0400)
257#define U300_SYSCON_PMC1LR_MMCSD_DSP (0x0800)
258#define U300_SYSCON_PMC1LR_MMCSD_WCDMA (0x0C00)
259#define U300_SYSCON_PMC1LR_ETM_MASK (0x0300)
260#define U300_SYSCON_PMC1LR_ETM_ACC (0x0000)
261#define U300_SYSCON_PMC1LR_ETM_APP (0x0100)
262#define U300_SYSCON_PMC1LR_EMIF_1_CS2_MASK (0x00C0)
263#define U300_SYSCON_PMC1LR_EMIF_1_CS2_STATIC (0x0000)
264#define U300_SYSCON_PMC1LR_EMIF_1_CS2_NFIF (0x0040)
265#define U300_SYSCON_PMC1LR_EMIF_1_CS2_SDRAM (0x0080)
266#define U300_SYSCON_PMC1LR_EMIF_1_CS2_STATIC_2GB (0x00C0)
267#define U300_SYSCON_PMC1LR_EMIF_1_CS1_MASK (0x0030)
268#define U300_SYSCON_PMC1LR_EMIF_1_CS1_STATIC (0x0000)
269#define U300_SYSCON_PMC1LR_EMIF_1_CS1_NFIF (0x0010)
270#define U300_SYSCON_PMC1LR_EMIF_1_CS1_SDRAM (0x0020)
271#define U300_SYSCON_PMC1LR_EMIF_1_CS1_SEMI (0x0030)
272#define U300_SYSCON_PMC1LR_EMIF_1_CS0_MASK (0x000C)
273#define U300_SYSCON_PMC1LR_EMIF_1_CS0_STATIC (0x0000)
274#define U300_SYSCON_PMC1LR_EMIF_1_CS0_NFIF (0x0004)
275#define U300_SYSCON_PMC1LR_EMIF_1_CS0_SDRAM (0x0008)
276#define U300_SYSCON_PMC1LR_EMIF_1_CS0_SEMI (0x000C)
277#define U300_SYSCON_PMC1LR_EMIF_1_MASK (0x0003)
278#define U300_SYSCON_PMC1LR_EMIF_1_STATIC (0x0000)
279#define U300_SYSCON_PMC1LR_EMIF_1_SDRAM0 (0x0001)
280#define U300_SYSCON_PMC1LR_EMIF_1_SDRAM1 (0x0002)
281#define U300_SYSCON_PMC1LR_EMIF_1 (0x0003)
282/* PAD MUX Control register 2 (HIGH) 16bit (R/W) */
283#define U300_SYSCON_PMC1HR (0x007E)
284#define U300_SYSCON_PMC1HR_MASK (0xFFFF)
285#define U300_SYSCON_PMC1HR_MISC_2_MASK (0xC000)
286#define U300_SYSCON_PMC1HR_MISC_2_APP_GPIO (0x0000)
287#define U300_SYSCON_PMC1HR_MISC_2_MSPRO (0x4000)
288#define U300_SYSCON_PMC1HR_MISC_2_DSP (0x8000)
289#define U300_SYSCON_PMC1HR_MISC_2_AAIF (0xC000)
290#define U300_SYSCON_PMC1HR_APP_GPIO_2_MASK (0x3000)
291#define U300_SYSCON_PMC1HR_APP_GPIO_2_APP_GPIO (0x0000)
292#define U300_SYSCON_PMC1HR_APP_GPIO_2_NFIF (0x1000)
293#define U300_SYSCON_PMC1HR_APP_GPIO_2_DSP (0x2000)
294#define U300_SYSCON_PMC1HR_APP_GPIO_2_AAIF (0x3000)
295#define U300_SYSCON_PMC1HR_APP_GPIO_1_MASK (0x0C00)
296#define U300_SYSCON_PMC1HR_APP_GPIO_1_APP_GPIO (0x0000)
297#define U300_SYSCON_PMC1HR_APP_GPIO_1_MMC (0x0400)
298#define U300_SYSCON_PMC1HR_APP_GPIO_1_DSP (0x0800)
299#define U300_SYSCON_PMC1HR_APP_GPIO_1_AAIF (0x0C00)
300#define U300_SYSCON_PMC1HR_APP_SPI_CS_2_MASK (0x0300)
301#define U300_SYSCON_PMC1HR_APP_SPI_CS_2_APP_GPIO (0x0000)
302#define U300_SYSCON_PMC1HR_APP_SPI_CS_2_SPI (0x0100)
303#define U300_SYSCON_PMC1HR_APP_SPI_CS_2_AAIF (0x0300)
304#define U300_SYSCON_PMC1HR_APP_SPI_CS_1_MASK (0x00C0)
305#define U300_SYSCON_PMC1HR_APP_SPI_CS_1_APP_GPIO (0x0000)
306#define U300_SYSCON_PMC1HR_APP_SPI_CS_1_SPI (0x0040)
307#define U300_SYSCON_PMC1HR_APP_SPI_CS_1_AAIF (0x00C0)
308#define U300_SYSCON_PMC1HR_APP_SPI_2_MASK (0x0030)
309#define U300_SYSCON_PMC1HR_APP_SPI_2_APP_GPIO (0x0000)
310#define U300_SYSCON_PMC1HR_APP_SPI_2_SPI (0x0010)
311#define U300_SYSCON_PMC1HR_APP_SPI_2_DSP (0x0020)
312#define U300_SYSCON_PMC1HR_APP_SPI_2_AAIF (0x0030)
313#define U300_SYSCON_PMC1HR_APP_UART0_2_MASK (0x000C)
314#define U300_SYSCON_PMC1HR_APP_UART0_2_APP_GPIO (0x0000)
315#define U300_SYSCON_PMC1HR_APP_UART0_2_UART0 (0x0004)
316#define U300_SYSCON_PMC1HR_APP_UART0_2_NFIF_CS (0x0008)
317#define U300_SYSCON_PMC1HR_APP_UART0_2_AAIF (0x000C)
318#define U300_SYSCON_PMC1HR_APP_UART0_1_MASK (0x0003)
319#define U300_SYSCON_PMC1HR_APP_UART0_1_APP_GPIO (0x0000)
320#define U300_SYSCON_PMC1HR_APP_UART0_1_UART0 (0x0001)
321#define U300_SYSCON_PMC1HR_APP_UART0_1_AAIF (0x0003)
322/* Step one for killing the applications system 16bit (-/W) */ 237/* Step one for killing the applications system 16bit (-/W) */
323#define U300_SYSCON_KA1R (0x0080) 238#define U300_SYSCON_KA1R (0x0080)
324#define U300_SYSCON_KA1R_MASK (0xFFFF) 239#define U300_SYSCON_KA1R_MASK (0xFFFF)
@@ -357,57 +272,6 @@
357#define U300_SYSCON_PUCR_EMIF_1_16BIT_PU_ENABLE (0x0080) 272#define U300_SYSCON_PUCR_EMIF_1_16BIT_PU_ENABLE (0x0080)
358#define U300_SYSCON_PUCR_EMIF_1_8BIT_PU_ENABLE (0x0040) 273#define U300_SYSCON_PUCR_EMIF_1_8BIT_PU_ENABLE (0x0040)
359#define U300_SYSCON_PUCR_KEY_IN_PU_EN_MASK (0x003F) 274#define U300_SYSCON_PUCR_KEY_IN_PU_EN_MASK (0x003F)
360/* Padmux 2 control */
361#define U300_SYSCON_PMC2R (0x100)
362#define U300_SYSCON_PMC2R_APP_MISC_0_MASK (0x00C0)
363#define U300_SYSCON_PMC2R_APP_MISC_0_APP_GPIO (0x0000)
364#define U300_SYSCON_PMC2R_APP_MISC_0_EMIF_SDRAM (0x0040)
365#define U300_SYSCON_PMC2R_APP_MISC_0_MMC (0x0080)
366#define U300_SYSCON_PMC2R_APP_MISC_0_CDI2 (0x00C0)
367#define U300_SYSCON_PMC2R_APP_MISC_1_MASK (0x0300)
368#define U300_SYSCON_PMC2R_APP_MISC_1_APP_GPIO (0x0000)
369#define U300_SYSCON_PMC2R_APP_MISC_1_EMIF_SDRAM (0x0100)
370#define U300_SYSCON_PMC2R_APP_MISC_1_MMC (0x0200)
371#define U300_SYSCON_PMC2R_APP_MISC_1_CDI2 (0x0300)
372#define U300_SYSCON_PMC2R_APP_MISC_2_MASK (0x0C00)
373#define U300_SYSCON_PMC2R_APP_MISC_2_APP_GPIO (0x0000)
374#define U300_SYSCON_PMC2R_APP_MISC_2_EMIF_SDRAM (0x0400)
375#define U300_SYSCON_PMC2R_APP_MISC_2_MMC (0x0800)
376#define U300_SYSCON_PMC2R_APP_MISC_2_CDI2 (0x0C00)
377#define U300_SYSCON_PMC2R_APP_MISC_3_MASK (0x3000)
378#define U300_SYSCON_PMC2R_APP_MISC_3_APP_GPIO (0x0000)
379#define U300_SYSCON_PMC2R_APP_MISC_3_EMIF_SDRAM (0x1000)
380#define U300_SYSCON_PMC2R_APP_MISC_3_MMC (0x2000)
381#define U300_SYSCON_PMC2R_APP_MISC_3_CDI2 (0x3000)
382#define U300_SYSCON_PMC2R_APP_MISC_4_MASK (0xC000)
383#define U300_SYSCON_PMC2R_APP_MISC_4_APP_GPIO (0x0000)
384#define U300_SYSCON_PMC2R_APP_MISC_4_EMIF_SDRAM (0x4000)
385#define U300_SYSCON_PMC2R_APP_MISC_4_MMC (0x8000)
386#define U300_SYSCON_PMC2R_APP_MISC_4_ACC_GPIO (0xC000)
387/* TODO: More SYSCON registers missing */
388#define U300_SYSCON_PMC3R (0x10c)
389#define U300_SYSCON_PMC3R_APP_MISC_11_MASK (0xc000)
390#define U300_SYSCON_PMC3R_APP_MISC_11_SPI (0x4000)
391#define U300_SYSCON_PMC3R_APP_MISC_10_MASK (0x3000)
392#define U300_SYSCON_PMC3R_APP_MISC_10_SPI (0x1000)
393/* TODO: Missing other configs */
394#define U300_SYSCON_PMC4R (0x168)
395#define U300_SYSCON_PMC4R_APP_MISC_12_MASK (0x0003)
396#define U300_SYSCON_PMC4R_APP_MISC_12_APP_GPIO (0x0000)
397#define U300_SYSCON_PMC4R_APP_MISC_13_MASK (0x000C)
398#define U300_SYSCON_PMC4R_APP_MISC_13_CDI (0x0000)
399#define U300_SYSCON_PMC4R_APP_MISC_13_SMIA (0x0004)
400#define U300_SYSCON_PMC4R_APP_MISC_13_SMIA2 (0x0008)
401#define U300_SYSCON_PMC4R_APP_MISC_13_APP_GPIO (0x000C)
402#define U300_SYSCON_PMC4R_APP_MISC_14_MASK (0x0030)
403#define U300_SYSCON_PMC4R_APP_MISC_14_CDI (0x0000)
404#define U300_SYSCON_PMC4R_APP_MISC_14_SMIA (0x0010)
405#define U300_SYSCON_PMC4R_APP_MISC_14_CDI2 (0x0020)
406#define U300_SYSCON_PMC4R_APP_MISC_14_APP_GPIO (0x0030)
407#define U300_SYSCON_PMC4R_APP_MISC_16_MASK (0x0300)
408#define U300_SYSCON_PMC4R_APP_MISC_16_APP_GPIO_13 (0x0000)
409#define U300_SYSCON_PMC4R_APP_MISC_16_APP_UART1_CTS (0x0100)
410#define U300_SYSCON_PMC4R_APP_MISC_16_EMIF_1_STATIC_CS5_N (0x0200)
411/* SYS_0_CLK_CONTROL first clock control 16bit (R/W) */ 275/* SYS_0_CLK_CONTROL first clock control 16bit (R/W) */
412#define U300_SYSCON_S0CCR (0x120) 276#define U300_SYSCON_S0CCR (0x120)
413#define U300_SYSCON_S0CCR_FIELD_MASK (0x43FF) 277#define U300_SYSCON_S0CCR_FIELD_MASK (0x43FF)
diff --git a/arch/arm/mach-u300/mmc.c b/arch/arm/mach-u300/mmc.c
index 677ccef5cd3..d5e4a98a9ab 100644
--- a/arch/arm/mach-u300/mmc.c
+++ b/arch/arm/mach-u300/mmc.c
@@ -21,7 +21,6 @@
21#include <mach/dma_channels.h> 21#include <mach/dma_channels.h>
22 22
23#include "mmc.h" 23#include "mmc.h"
24#include "padmux.h"
25 24
26static struct mmci_platform_data mmc0_plat_data = { 25static struct mmci_platform_data mmc0_plat_data = {
27 /* 26 /*
@@ -45,24 +44,9 @@ static struct mmci_platform_data mmc0_plat_data = {
45int __devinit mmc_init(struct amba_device *adev) 44int __devinit mmc_init(struct amba_device *adev)
46{ 45{
47 struct device *mmcsd_device = &adev->dev; 46 struct device *mmcsd_device = &adev->dev;
48 struct pmx *pmx;
49 int ret = 0; 47 int ret = 0;
50 48
51 mmcsd_device->platform_data = &mmc0_plat_data; 49 mmcsd_device->platform_data = &mmc0_plat_data;
52 50
53 /*
54 * Setup padmuxing for MMC. Since this must always be
55 * compiled into the kernel, pmx is never released.
56 */
57 pmx = pmx_get(mmcsd_device, U300_APP_PMX_MMC_SETTING);
58
59 if (IS_ERR(pmx))
60 pr_warning("Could not get padmux handle\n");
61 else {
62 ret = pmx_activate(mmcsd_device, pmx);
63 if (IS_ERR_VALUE(ret))
64 pr_warning("Could not activate padmuxing\n");
65 }
66
67 return ret; 51 return ret;
68} 52}
diff --git a/arch/arm/mach-u300/padmux.c b/arch/arm/mach-u300/padmux.c
deleted file mode 100644
index 4c93c6cefd3..00000000000
--- a/arch/arm/mach-u300/padmux.c
+++ /dev/null
@@ -1,367 +0,0 @@
1/*
2 *
3 * arch/arm/mach-u300/padmux.c
4 *
5 *
6 * Copyright (C) 2009 ST-Ericsson AB
7 * License terms: GNU General Public License (GPL) version 2
8 * U300 PADMUX functions
9 * Author: Martin Persson <martin.persson@stericsson.com>
10 */
11
12#include <linux/module.h>
13#include <linux/kernel.h>
14#include <linux/device.h>
15#include <linux/err.h>
16#include <linux/errno.h>
17#include <linux/io.h>
18#include <linux/mutex.h>
19#include <linux/string.h>
20#include <linux/bug.h>
21#include <linux/debugfs.h>
22#include <linux/seq_file.h>
23#include <mach/u300-regs.h>
24#include <mach/syscon.h>
25#include "padmux.h"
26
27static DEFINE_MUTEX(pmx_mutex);
28
29const u32 pmx_registers[] = {
30 (U300_SYSCON_VBASE + U300_SYSCON_PMC1LR),
31 (U300_SYSCON_VBASE + U300_SYSCON_PMC1HR),
32 (U300_SYSCON_VBASE + U300_SYSCON_PMC2R),
33 (U300_SYSCON_VBASE + U300_SYSCON_PMC3R),
34 (U300_SYSCON_VBASE + U300_SYSCON_PMC4R)
35};
36
37/* High level functionality */
38
39/* Lazy dog:
40 * onmask = {
41 * {"PMC1LR" mask, "PMC1LR" value},
42 * {"PMC1HR" mask, "PMC1HR" value},
43 * {"PMC2R" mask, "PMC2R" value},
44 * {"PMC3R" mask, "PMC3R" value},
45 * {"PMC4R" mask, "PMC4R" value}
46 * }
47 */
48static struct pmx mmc_setting = {
49 .setting = U300_APP_PMX_MMC_SETTING,
50 .default_on = false,
51 .activated = false,
52 .name = "MMC",
53 .onmask = {
54 {U300_SYSCON_PMC1LR_MMCSD_MASK,
55 U300_SYSCON_PMC1LR_MMCSD_MMCSD},
56 {0, 0},
57 {0, 0},
58 {0, 0},
59 {U300_SYSCON_PMC4R_APP_MISC_12_MASK,
60 U300_SYSCON_PMC4R_APP_MISC_12_APP_GPIO}
61 },
62};
63
64static struct pmx spi_setting = {
65 .setting = U300_APP_PMX_SPI_SETTING,
66 .default_on = false,
67 .activated = false,
68 .name = "SPI",
69 .onmask = {{0, 0},
70 {U300_SYSCON_PMC1HR_APP_SPI_2_MASK |
71 U300_SYSCON_PMC1HR_APP_SPI_CS_1_MASK |
72 U300_SYSCON_PMC1HR_APP_SPI_CS_2_MASK,
73 U300_SYSCON_PMC1HR_APP_SPI_2_SPI |
74 U300_SYSCON_PMC1HR_APP_SPI_CS_1_SPI |
75 U300_SYSCON_PMC1HR_APP_SPI_CS_2_SPI},
76 {0, 0},
77 {0, 0},
78 {0, 0}
79 },
80};
81
82/* Available padmux settings */
83static struct pmx *pmx_settings[] = {
84 &mmc_setting,
85 &spi_setting,
86};
87
88static void update_registers(struct pmx *pmx, bool activate)
89{
90 u16 regval, val, mask;
91 int i;
92
93 for (i = 0; i < ARRAY_SIZE(pmx_registers); i++) {
94 if (activate)
95 val = pmx->onmask[i].val;
96 else
97 val = 0;
98
99 mask = pmx->onmask[i].mask;
100 if (mask != 0) {
101 regval = readw(pmx_registers[i]);
102 regval &= ~mask;
103 regval |= val;
104 writew(regval, pmx_registers[i]);
105 }
106 }
107}
108
109struct pmx *pmx_get(struct device *dev, enum pmx_settings setting)
110{
111 int i;
112 struct pmx *pmx = ERR_PTR(-ENOENT);
113
114 if (dev == NULL)
115 return ERR_PTR(-EINVAL);
116
117 mutex_lock(&pmx_mutex);
118 for (i = 0; i < ARRAY_SIZE(pmx_settings); i++) {
119
120 if (setting == pmx_settings[i]->setting) {
121
122 if (pmx_settings[i]->dev != NULL) {
123 WARN(1, "padmux: required setting "
124 "in use by another consumer\n");
125 } else {
126 pmx = pmx_settings[i];
127 pmx->dev = dev;
128 dev_dbg(dev, "padmux: setting nr %d is now "
129 "bound to %s and ready to use\n",
130 setting, dev_name(dev));
131 break;
132 }
133 }
134 }
135 mutex_unlock(&pmx_mutex);
136
137 return pmx;
138}
139EXPORT_SYMBOL(pmx_get);
140
141int pmx_put(struct device *dev, struct pmx *pmx)
142{
143 int i;
144 int ret = -ENOENT;
145
146 if (pmx == NULL || dev == NULL)
147 return -EINVAL;
148
149 mutex_lock(&pmx_mutex);
150 for (i = 0; i < ARRAY_SIZE(pmx_settings); i++) {
151
152 if (pmx->setting == pmx_settings[i]->setting) {
153
154 if (dev != pmx->dev) {
155 WARN(1, "padmux: cannot release handle as "
156 "it is bound to another consumer\n");
157 ret = -EINVAL;
158 break;
159 } else {
160 pmx_settings[i]->dev = NULL;
161 ret = 0;
162 break;
163 }
164 }
165 }
166 mutex_unlock(&pmx_mutex);
167
168 return ret;
169}
170EXPORT_SYMBOL(pmx_put);
171
172int pmx_activate(struct device *dev, struct pmx *pmx)
173{
174 int i, j, ret;
175 ret = 0;
176
177 if (pmx == NULL || dev == NULL)
178 return -EINVAL;
179
180 mutex_lock(&pmx_mutex);
181
182 /* Make sure the required bits are not used */
183 for (i = 0; i < ARRAY_SIZE(pmx_settings); i++) {
184
185 if (pmx_settings[i]->dev == NULL || pmx_settings[i] == pmx)
186 continue;
187
188 for (j = 0; j < ARRAY_SIZE(pmx_registers); j++) {
189
190 if (pmx_settings[i]->onmask[j].mask & pmx->
191 onmask[j].mask) {
192 /* More than one entry on the same bits */
193 WARN(1, "padmux: cannot activate "
194 "setting. Bit conflict with "
195 "an active setting\n");
196
197 ret = -EUSERS;
198 goto exit;
199 }
200 }
201 }
202 update_registers(pmx, true);
203 pmx->activated = true;
204 dev_dbg(dev, "padmux: setting nr %d is activated\n",
205 pmx->setting);
206
207exit:
208 mutex_unlock(&pmx_mutex);
209 return ret;
210}
211EXPORT_SYMBOL(pmx_activate);
212
213int pmx_deactivate(struct device *dev, struct pmx *pmx)
214{
215 int i;
216 int ret = -ENOENT;
217
218 if (pmx == NULL || dev == NULL)
219 return -EINVAL;
220
221 mutex_lock(&pmx_mutex);
222 for (i = 0; i < ARRAY_SIZE(pmx_settings); i++) {
223
224 if (pmx_settings[i]->dev == NULL)
225 continue;
226
227 if (pmx->setting == pmx_settings[i]->setting) {
228
229 if (dev != pmx->dev) {
230 WARN(1, "padmux: cannot deactivate "
231 "pmx setting as it was activated "
232 "by another consumer\n");
233
234 ret = -EBUSY;
235 continue;
236 } else {
237 update_registers(pmx, false);
238 pmx_settings[i]->dev = NULL;
239 pmx->activated = false;
240 ret = 0;
241 dev_dbg(dev, "padmux: setting nr %d is deactivated",
242 pmx->setting);
243 break;
244 }
245 }
246 }
247 mutex_unlock(&pmx_mutex);
248
249 return ret;
250}
251EXPORT_SYMBOL(pmx_deactivate);
252
253/*
254 * For internal use only. If it is to be exported,
255 * it should be reentrant. Notice that pmx_activate
256 * (i.e. runtime settings) always override default settings.
257 */
258static int pmx_set_default(void)
259{
260 /* Used to identify several entries on the same bits */
261 u16 modbits[ARRAY_SIZE(pmx_registers)];
262
263 int i, j;
264
265 memset(modbits, 0, ARRAY_SIZE(pmx_registers) * sizeof(u16));
266
267 for (i = 0; i < ARRAY_SIZE(pmx_settings); i++) {
268
269 if (!pmx_settings[i]->default_on)
270 continue;
271
272 for (j = 0; j < ARRAY_SIZE(pmx_registers); j++) {
273
274 /* Make sure there is only one entry on the same bits */
275 if (modbits[j] & pmx_settings[i]->onmask[j].mask) {
276 BUG();
277 return -EUSERS;
278 }
279 modbits[j] |= pmx_settings[i]->onmask[j].mask;
280 }
281 update_registers(pmx_settings[i], true);
282 }
283 return 0;
284}
285
286#if (defined(CONFIG_DEBUG_FS) && defined(CONFIG_U300_DEBUG))
287static int pmx_show(struct seq_file *s, void *data)
288{
289 int i;
290 seq_printf(s, "-------------------------------------------------\n");
291 seq_printf(s, "SETTING BOUND TO DEVICE STATE\n");
292 seq_printf(s, "-------------------------------------------------\n");
293 mutex_lock(&pmx_mutex);
294 for (i = 0; i < ARRAY_SIZE(pmx_settings); i++) {
295 /* Format pmx and device name nicely */
296 char cdp[33];
297 int chars;
298
299 chars = snprintf(&cdp[0], 17, "%s", pmx_settings[i]->name);
300 while (chars < 16) {
301 cdp[chars] = ' ';
302 chars++;
303 }
304 chars = snprintf(&cdp[16], 17, "%s", pmx_settings[i]->dev ?
305 dev_name(pmx_settings[i]->dev) : "N/A");
306 while (chars < 16) {
307 cdp[chars+16] = ' ';
308 chars++;
309 }
310 cdp[32] = '\0';
311
312 seq_printf(s,
313 "%s\t%s\n",
314 &cdp[0],
315 pmx_settings[i]->activated ?
316 "ACTIVATED" : "DEACTIVATED"
317 );
318
319 }
320 mutex_unlock(&pmx_mutex);
321 return 0;
322}
323
324static int pmx_open(struct inode *inode, struct file *file)
325{
326 return single_open(file, pmx_show, NULL);
327}
328
329static const struct file_operations pmx_operations = {
330 .owner = THIS_MODULE,
331 .open = pmx_open,
332 .read = seq_read,
333 .llseek = seq_lseek,
334 .release = single_release,
335};
336
337static int __init init_pmx_read_debugfs(void)
338{
339 /* Expose a simple debugfs interface to view pmx settings */
340 (void) debugfs_create_file("padmux", S_IFREG | S_IRUGO,
341 NULL, NULL,
342 &pmx_operations);
343 return 0;
344}
345
346/*
347 * This needs to come in after the core_initcall(),
348 * because debugfs is not available until
349 * the subsystems come up.
350 */
351module_init(init_pmx_read_debugfs);
352#endif
353
354static int __init pmx_init(void)
355{
356 int ret;
357
358 ret = pmx_set_default();
359
360 if (IS_ERR_VALUE(ret))
361 pr_crit("padmux: default settings could not be set\n");
362
363 return 0;
364}
365
366/* Should be initialized before consumers */
367core_initcall(pmx_init);
diff --git a/arch/arm/mach-u300/padmux.h b/arch/arm/mach-u300/padmux.h
deleted file mode 100644
index 6e8b8606409..00000000000
--- a/arch/arm/mach-u300/padmux.h
+++ /dev/null
@@ -1,39 +0,0 @@
1/*
2 *
3 * arch/arm/mach-u300/padmux.h
4 *
5 *
6 * Copyright (C) 2009 ST-Ericsson AB
7 * License terms: GNU General Public License (GPL) version 2
8 * U300 PADMUX API
9 * Author: Martin Persson <martin.persson@stericsson.com>
10 */
11
12#ifndef __MACH_U300_PADMUX_H
13#define __MACH_U300_PADMUX_H
14
15enum pmx_settings {
16 U300_APP_PMX_MMC_SETTING,
17 U300_APP_PMX_SPI_SETTING
18};
19
20struct pmx_onmask {
21 u16 mask; /* Mask bits */
22 u16 val; /* Value when active */
23};
24
25struct pmx {
26 struct device *dev;
27 enum pmx_settings setting;
28 char *name;
29 bool activated;
30 bool default_on;
31 struct pmx_onmask onmask[];
32};
33
34struct pmx *pmx_get(struct device *dev, enum pmx_settings setting);
35int pmx_put(struct device *dev, struct pmx *pmx);
36int pmx_activate(struct device *dev, struct pmx *pmx);
37int pmx_deactivate(struct device *dev, struct pmx *pmx);
38
39#endif
diff --git a/arch/arm/mach-u300/spi.c b/arch/arm/mach-u300/spi.c
index 7b597e2b19e..a1affacfa59 100644
--- a/arch/arm/mach-u300/spi.c
+++ b/arch/arm/mach-u300/spi.c
@@ -14,8 +14,6 @@
14#include <mach/coh901318.h> 14#include <mach/coh901318.h>
15#include <mach/dma_channels.h> 15#include <mach/dma_channels.h>
16 16
17#include "padmux.h"
18
19/* 17/*
20 * The following is for the actual devices on the SSP/SPI bus 18 * The following is for the actual devices on the SSP/SPI bus
21 */ 19 */
@@ -95,25 +93,7 @@ static struct pl022_ssp_controller ssp_platform_data = {
95 93
96void __init u300_spi_init(struct amba_device *adev) 94void __init u300_spi_init(struct amba_device *adev)
97{ 95{
98 struct pmx *pmx;
99
100 adev->dev.platform_data = &ssp_platform_data; 96 adev->dev.platform_data = &ssp_platform_data;
101 /*
102 * Setup padmuxing for SPI. Since this must always be
103 * compiled into the kernel, pmx is never released.
104 */
105 pmx = pmx_get(&adev->dev, U300_APP_PMX_SPI_SETTING);
106
107 if (IS_ERR(pmx))
108 dev_warn(&adev->dev, "Could not get padmux handle\n");
109 else {
110 int ret;
111
112 ret = pmx_activate(&adev->dev, pmx);
113 if (IS_ERR_VALUE(ret))
114 dev_warn(&adev->dev, "Could not activate padmuxing\n");
115 }
116
117} 97}
118 98
119void __init u300_spi_register_board_devices(void) 99void __init u300_spi_register_board_devices(void)
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-29 05:03:52 -0500