Merge branch 'master' of git://git.denx.de/u-boot-arm

* 'master' of git://git.denx.de/u-boot-arm: (167 commits)
  OMAP4/5: Change omap4_sdp, omap4_panda, omap5_evm maintainer
  ARM: omap3: Add CONFIG_SPL_BOARD_INIT for CONFIG_SPL_MMC_SUPPORT
  ARM: omap3: Set SPL stack size to 8KB, image to 54KB.
  arm, omap3: fix warm reset serial output on OMAP36xx/AM/DM37xx
  OMAP4: Set fdt_high for OMAP4 devices to enable booting with Device Tree
  omap4: do not enable auxiliary cores
  omap4: do not enable fs-usb module
  omap4: panda: disable uart2 pads during boot
  igep00x0: change mpurate from 500 to auto
  igep00x0: enable the use of a plain text file
  tegra2: trivially enable 13 mhz crystal frequency
  tegra: Enable keyboard for Seaboard
  tegra: Switch on console mux and use environment for console
  tegra: Add tegra keyboard driver
  tegra: fdt: Add keyboard definitions for Seaboard
  tegra: fdt: Add keyboard controller definition
  tegra: Add keyboard support to funcmux
  input: Add support for keyboard matrix decoding from an fdt
  input: Add generic keyboard input handler
  input: Add linux/input.h for key code support
  fdt: Add fdtdec functions to read byte array
  tegra: Enable LP0 on Seaboard
  tegra: fdt: Add EMC data for Tegra2 Seaboard
  tegra: i2c: Add function to find DVC bus
  fdt: tegra: Add EMC node to device tree
  tegra: Add EMC settings for Seaboard
  tegra: Turn off power detect in board init
  tegra: Set up warmboot code on Nvidia boards
  tegra: Setup PMC scratch info from ap20 setup
  tegra: Add warmboot implementation
  tegra: Set up PMU for Nvidia boards
  tegra: Add PMU to manage power supplies
  tegra: Add EMC support for optimal memory timings
  tegra: Add header file for APB_MISC register
  tegra: Add tegra_get_chip_type() to detect SKU
  tegra: Add flow, gp_padctl, fuse, sdram headers
  tegra: Add crypto library for warmboot code
  tegra: Add functions to access low-level Osc/PLL details
  tegra: Move ap20.h header into arch location
  Add AES crypto library
  i2c: Add TPS6586X driver
  Add abs() macro to return absolute value
  fdt: Add function to return next compatible subnode
  fdt: Add function to locate an array in the device tree
  i.MX28: Avoid redefining serial_put[cs]()
  i.MX28: Check if WP detection is implemented at all
  i.MX28: Add battery boot components to SPL
  i.MX28: Reorder battery status functions in SPL
  i.MX28: Add LRADC init to i.MX28 SPL
  i.MX28: Add LRADC register definitions
  i.MX28: Shut down the LCD controller before reset
  i.MX28: Add LCDIF register definitions
  i.MX28: Implement boot pads sampling and reporting
  i.MX28: Improve passing of data from SPL to U-Boot
  M28EVK: Add SD update command
  M28EVK: Implement support for new board V2.0
  FEC: Abstract out register setup
  MX5: PAD_CTL_DRV_VOT_LOW and PAD_CTL_DRV_VOT_HIGH exchanged
  i.MX28: Add delay after CPU bypass is cleared
  spi: mxs: Allow other chip selects to work
  spi: mxs: Introduce spi_cs_is_valid()
  mx53loco: Remove unneeded gpio_set_value()
  mx53loco: Add CONFIG_REVISION_TAG
  mx53loco: Turn on VUSB regulator
  mx53loco: Add mc34708 support and set mx53 frequency at 1GHz
  pmic: dialog: Avoid name conflicts
  imx: Add u-boot.imx as target for ARM9 i.MX SOCs
  i.MX2: Include asm/types.h in arch-mx25/imx-regs.h
  imx: usb: There is no such register
  i.MX25: usb: Set PORTSCx register
  imx: nand: Support flash based BBT
  i.MX25: This architecture has a GPIO4 too
  i.MX25: esdhc: Add mxc_get_clock infrastructure
  i.MX6: mx6q_sabrelite: add SATA bindings
  i.MX6: add enable_sata_clock()
  i.MX6: Add ANATOP regulator init
  mx28evk: add NAND support
  USB: ehci-mx6: Fix broken IO access
  M28: Scan only first 512 MB of DRAM to avoid memory wraparound
  Revert "i.MX28: Enable additional DRAM address bits"
  M28: Enable FDT support
  mx53loco: Add support for 1GHz operation for DA9053-based boards
  mx53loco: Allow to print CPU information at a later stage
  mx5: Add clock config interface
  imx-common: Factor out get_ahb_clk()
  i.MX6Q: mx6qsabrelite: Add keypress support to alter boot flow
  mx31pdk: Allow booting a zImage kernel
  mx6qarm2: Allow booting a zImage kernel
  mx6qsabrelite: Allow booting a zImage kernel
  mx28evk: Allow booting a zImage kernel
  m28evk: Allow to booting a dt kernel
  mx28evk: Allow to booting a dt kernel
  mx6qsabrelite: No need to set the direction for GPIO3_23 again
  pmic: Add support for the Dialog DA9053 PMIC
  MX53: mx53loco: Add SATA support
  MX53: Add support to ESG ima3 board
  SATA: add driver for MX5 / MX6 SOCs
  MX53: add function to set SATA clock to internal
  SATA: check for return value from sata functions
  MX5: Add definitions for SATA controller
  NET: fec_mxc.c: Add a way to disable auto negotiation
  Define UART4 and UART5 base addresses
  EXYNOS: Change bits per pixel value proper for u-boot.
  EXYNOS: support TRATS board display function
  LCD: support S6E8AX0 amoled driver based on EXYNOS MIPI DSI
  EXYNOS: support EXYNOS MIPI DSI interface driver.
  EXYNOS: support EXYNOS framebuffer and FIMD display drivers.
  LCD: add data structure for EXYNOS display driver
  EXYNOS: add LCD and MIPI DSI clock interface.
  EXYNOS: definitions of system resgister and power management registers.
  SMDK5250: fix compiler warning
  misc:pmic:samsung Convert TRATS target to use MAX8997 instead of MAX8998
  misc:pmic:max8997 MAX8997 support for PMIC driver
  TRATS: modify the trats's configuration
  ARM: Exynos4: ADC: Universal_C210: Enable LDO4 power line for ADC measurement
  EXYNOS: Rename exynos5_tzpc structure to exynos_tzpc
  arm: ea20: Change macro from BOARD_LATE_INIT to CONFIG_BOARD_LATE_INIT
  arm: cam_enc_4xx: Change macro from BOARD_LATE_INIT to CONFIG_BOARD_LATE_INIT
  cm-t35: add I2C multi-bus support
  include/configs: Remove CONFIG_SYS_64BIT_STRTOUL
  include/configs: Remove CONFIG_SYS_64BIT_VSPRINTF
  omap3: Introduce weak misc_init_r
  omap730p2: Remove empty misc_init_r
  omap5912osk: Remove empty misc_init_r
  omap4+: Remove CONFIG_ARCH_CPU_INIT
  omap4: Remove CONFIG_SYS_MMC_SET_DEV
  OMAP3: pandora: drop console kernel argument
  OMAP3: pandora: revise GPIO configuration
  ...

1 files changed, 375 insertions, 0 deletions

diff --git a/drivers/input/tegra-kbc.c b/drivers/input/tegra-kbc.c
new file mode 100644
index 0000000000..f164791bee
--- /dev/null
+++ b/drivers/input/tegra-kbc.c
@@ -0,0 +1,375 @@
+/*
+ *  (C) Copyright 2011
+ *  NVIDIA Corporation <www.nvidia.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <fdtdec.h>
+#include <input.h>
+#include <key_matrix.h>
+#include <stdio_dev.h>
+#include <tegra-kbc.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/funcmux.h>
+#include <asm/arch/timer.h>
+#include <linux/input.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+enum {
+	KBC_MAX_GPIO		= 24,
+	KBC_MAX_KPENT		= 8,	/* size of keypress entry queue */
+};
+
+#define KBC_FIFO_TH_CNT_SHIFT		14
+#define KBC_DEBOUNCE_CNT_SHIFT		4
+#define KBC_CONTROL_FIFO_CNT_INT_EN	(1 << 3)
+#define KBC_CONTROL_KBC_EN		(1 << 0)
+#define KBC_INT_FIFO_CNT_INT_STATUS	(1 << 2)
+#define KBC_KPENT_VALID			(1 << 7)
+#define KBC_ST_STATUS			(1 << 3)
+
+enum {
+	KBC_DEBOUNCE_COUNT	= 2,
+	KBC_REPEAT_RATE_MS	= 30,
+	KBC_REPEAT_DELAY_MS	= 240,
+	KBC_CLOCK_KHZ		= 32,	/* Keyboard uses a 32KHz clock */
+};
+
+/* keyboard controller config and state */
+static struct keyb {
+	struct input_config input;	/* The input layer */
+	struct key_matrix matrix;	/* The key matrix layer */
+
+	struct kbc_tegra *kbc;		/* tegra keyboard controller */
+	unsigned char inited;		/* 1 if keyboard has been inited */
+	unsigned char first_scan;	/* 1 if this is our first key scan */
+
+	/*
+	 * After init we must wait a short time before polling the keyboard.
+	 * This gives the tegra keyboard controller time to react after reset
+	 * and lets us grab keys pressed during reset.
+	 */
+	unsigned int init_dly_ms;	/* Delay before we can read keyboard */
+	unsigned int start_time_ms;	/* Time that we inited (in ms) */
+	unsigned int last_poll_ms;	/* Time we should last polled */
+	unsigned int next_repeat_ms;	/* Next time we repeat a key */
+} config;
+
+/**
+ * reads the keyboard fifo for current keypresses
+ *
+ * @param config	Keyboard config
+ * @param fifo		Place to put fifo results
+ * @param max_keycodes	Maximum number of key codes to put in the fifo
+ * @return number of items put into fifo
+ */
+static int tegra_kbc_find_keys(struct keyb *config, int *fifo,
+			       int max_keycodes)
+{
+	struct key_matrix_key keys[KBC_MAX_KPENT], *key;
+	u32 kp_ent = 0;
+	int i;
+
+	for (key = keys, i = 0; i < KBC_MAX_KPENT; i++, key++) {
+		/* Get next word */
+		if (!(i & 3))
+			kp_ent = readl(&config->kbc->kp_ent[i / 4]);
+
+		key->valid = (kp_ent & KBC_KPENT_VALID) != 0;
+		key->row = (kp_ent >> 3) & 0xf;
+		key->col = kp_ent & 0x7;
+
+		/* Shift to get next entry */
+		kp_ent >>= 8;
+	}
+	return key_matrix_decode(&config->matrix, keys, KBC_MAX_KPENT, fifo,
+				 max_keycodes);
+}
+
+/**
+ * Process all the keypress sequences in fifo and send key codes
+ *
+ * The fifo contains zero or more keypress sets. Each set
+ * consists of from 1-8 keycodes, representing the keycodes which
+ * were simultaneously pressed during that scan.
+ *
+ * This function works through each set and generates ASCII characters
+ * for each. Not that one set may produce more than one ASCII characters -
+ * for example holding down 'd' and 'f' at the same time will generate
+ * two ASCII characters.
+ *
+ * Note: if fifo_cnt is 0, we will tell the input layer that no keys are
+ * pressed.
+ *
+ * @param config	Keyboard config
+ * @param fifo_cnt	Number of entries in the keyboard fifo
+ */
+static void process_fifo(struct keyb *config, int fifo_cnt)
+{
+	int fifo[KBC_MAX_KPENT];
+	int cnt = 0;
+
+	/* Always call input_send_keycodes() at least once */
+	do {
+		if (fifo_cnt)
+			cnt = tegra_kbc_find_keys(config, fifo, KBC_MAX_KPENT);
+
+		input_send_keycodes(&config->input, fifo, cnt);
+	} while (--fifo_cnt > 0);
+}
+
+/**
+ * Check the keyboard controller and emit ASCII characters for any keys that
+ * are pressed.
+ *
+ * @param config	Keyboard config
+ */
+static void check_for_keys(struct keyb *config)
+{
+	int fifo_cnt;
+
+	if (!config->first_scan &&
+			get_timer(config->last_poll_ms) < KBC_REPEAT_RATE_MS)
+		return;
+	config->last_poll_ms = get_timer(0);
+	config->first_scan = 0;
+
+	/*
+	 * Once we get here we know the keyboard has been scanned. So if there
+	 * scan waiting for us, we know that nothing is held down.
+	 */
+	fifo_cnt = (readl(&config->kbc->interrupt) >> 4) & 0xf;
+	process_fifo(config, fifo_cnt);
+}
+
+/**
+ * In order to detect keys pressed on boot, wait for the hardware to
+ * complete scanning the keys. This includes time to transition from
+ * Wkup mode to Continous polling mode and the repoll time. We can
+ * deduct the time that's already elapsed.
+ *
+ * @param config	Keyboard config
+ */
+static void kbd_wait_for_fifo_init(struct keyb *config)
+{
+	if (!config->inited) {
+		unsigned long elapsed_time;
+		long delay_ms;
+
+		elapsed_time = get_timer(config->start_time_ms);
+		delay_ms = config->init_dly_ms - elapsed_time;
+		if (delay_ms > 0) {
+			udelay(delay_ms * 1000);
+			debug("%s: delay %ldms\n", __func__, delay_ms);
+		}
+
+		config->inited = 1;
+	}
+}
+
+/**
+ * Check the tegra keyboard, and send any keys that are pressed.
+ *
+ * This is called by input_tstc() and input_getc() when they need more
+ * characters
+ *
+ * @param input		Input configuration
+ * @return 1, to indicate that we have something to look at
+ */
+int tegra_kbc_check(struct input_config *input)
+{
+	kbd_wait_for_fifo_init(&config);
+	check_for_keys(&config);
+
+	return 1;
+}
+
+/**
+ * Test if keys are available to be read
+ *
+ * @return 0 if no keys available, 1 if keys are available
+ */
+static int kbd_tstc(void)
+{
+	/* Just get input to do this for us */
+	return input_tstc(&config.input);
+}
+
+/**
+ * Read a key
+ *
+ * TODO: U-Boot wants 0 for no key, but Ctrl-@ is a valid key...
+ *
+ * @return ASCII key code, or 0 if no key, or -1 if error
+ */
+static int kbd_getc(void)
+{
+	/* Just get input to do this for us */
+	return input_getc(&config.input);
+}
+
+/* configures keyboard GPIO registers to use the rows and columns */
+static void config_kbc_gpio(struct kbc_tegra *kbc)
+{
+	int i;
+
+	for (i = 0; i < KBC_MAX_GPIO; i++) {
+		u32 row_cfg, col_cfg;
+		u32 r_shift = 5 * (i % 6);
+		u32 c_shift = 4 * (i % 8);
+		u32 r_mask = 0x1f << r_shift;
+		u32 c_mask = 0xf << c_shift;
+		u32 r_offs = i / 6;
+		u32 c_offs = i / 8;
+
+		row_cfg = readl(&kbc->row_cfg[r_offs]);
+		col_cfg = readl(&kbc->col_cfg[c_offs]);
+
+		row_cfg &= ~r_mask;
+		col_cfg &= ~c_mask;
+
+		if (i < config.matrix.num_rows) {
+			row_cfg |= ((i << 1) | 1) << r_shift;
+		} else {
+			col_cfg |= (((i - config.matrix.num_rows) << 1) | 1)
+					<< c_shift;
+		}
+
+		writel(row_cfg, &kbc->row_cfg[r_offs]);
+		writel(col_cfg, &kbc->col_cfg[c_offs]);
+	}
+}
+
+/**
+ * Start up the keyboard device
+ */
+static void tegra_kbc_open(void)
+{
+	struct kbc_tegra *kbc = config.kbc;
+	unsigned int scan_period;
+	u32 val;
+
+	/*
+	 * We will scan at twice the keyboard repeat rate, so that there is
+	 * always a scan ready when we check it in check_for_keys().
+	 */
+	scan_period = KBC_REPEAT_RATE_MS / 2;
+	writel(scan_period * KBC_CLOCK_KHZ, &kbc->rpt_dly);
+	writel(scan_period * KBC_CLOCK_KHZ, &kbc->init_dly);
+	/*
+	 * Before reading from the keyboard we must wait for the init_dly
+	 * plus the rpt_delay, plus 2ms for the row scan time.
+	 */
+	config.init_dly_ms = scan_period * 2 + 2;
+
+	val = KBC_DEBOUNCE_COUNT << KBC_DEBOUNCE_CNT_SHIFT;
+	val |= 1 << KBC_FIFO_TH_CNT_SHIFT;	/* fifo interrupt threshold */
+	val |= KBC_CONTROL_KBC_EN;		/* enable */
+	writel(val, &kbc->control);
+
+	config.start_time_ms = get_timer(0);
+	config.last_poll_ms = config.next_repeat_ms = get_timer(0);
+	config.first_scan = 1;
+}
+
+/**
+ * Set up the tegra keyboard. This is called by the stdio device handler
+ *
+ * We want to do this init when the keyboard is actually used rather than
+ * at start-up, since keyboard input may not currently be selected.
+ *
+ * Once the keyboard starts there will be a period during which we must
+ * wait for the keyboard to init. We do this only when a key is first
+ * read - see kbd_wait_for_fifo_init().
+ *
+ * @return 0 if ok, -ve on error
+ */
+static int init_tegra_keyboard(void)
+{
+#ifdef CONFIG_OF_CONTROL
+	int	node;
+
+	node = fdtdec_next_compatible(gd->fdt_blob, 0,
+					  COMPAT_NVIDIA_TEGRA20_KBC);
+	if (node < 0) {
+		debug("%s: cannot locate keyboard node\n", __func__);
+		return node;
+	}
+	config.kbc = (struct kbc_tegra *)fdtdec_get_addr(gd->fdt_blob,
+		       node, "reg");
+	if ((fdt_addr_t)config.kbc == FDT_ADDR_T_NONE) {
+		debug("%s: No keyboard register found\n", __func__);
+		return -1;
+	}
+
+	/* Decode the keyboard matrix information (16 rows, 8 columns) */
+	if (key_matrix_init(&config.matrix, 16, 8)) {
+		debug("%s: Could not init key matrix\n", __func__);
+		return -1;
+	}
+	if (key_matrix_decode_fdt(&config.matrix, gd->fdt_blob, node)) {
+		debug("%s: Could not decode key matrix from fdt\n", __func__);
+		return -1;
+	}
+	if (config.matrix.fn_keycode) {
+		if (input_add_table(&config.input, KEY_FN, -1,
+				    config.matrix.fn_keycode,
+				    config.matrix.key_count))
+			return -1;
+	}
+#else
+#error "Tegra keyboard driver requires FDT definitions"
+#endif
+
+	/* Set up pin mux and enable the clock */
+	funcmux_select(PERIPH_ID_KBC, FUNCMUX_DEFAULT);
+	clock_enable(PERIPH_ID_KBC);
+	config_kbc_gpio(config.kbc);
+
+	tegra_kbc_open();
+	debug("%s: Tegra keyboard ready\n", __func__);
+
+	return 0;
+}
+
+int drv_keyboard_init(void)
+{
+	struct stdio_dev dev;
+
+	if (input_init(&config.input, 0, KBC_REPEAT_DELAY_MS,
+			KBC_REPEAT_RATE_MS)) {
+		debug("%s: Cannot set up input\n", __func__);
+		return -1;
+	}
+	config.input.read_keys = tegra_kbc_check;
+
+	memset(&dev, '\0', sizeof(dev));
+	strcpy(dev.name, "tegra-kbc");
+	dev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
+	dev.getc = kbd_getc;
+	dev.tstc = kbd_tstc;
+	dev.start = init_tegra_keyboard;
+
+	/* Register the device. init_tegra_keyboard() will be called soon */
+	return input_stdio_register(&dev);
+}