Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linuxgrafted

Pull I3C updates from Alexandre Belloni:
 "A new driver this cycle, for the AMD AXI I3C controller.

  There are also new features such as IBI wakeup support, SETAASA device
  discovery and ACPI support for the the DAA methods, meaning we can now
  communicate with the SPD devices on DDR5 modules.

  New driver:
   - AMD AXI I3C master controller

  Subsystem:
   - I3C Common Command Code (CCC) handling improvements, especially
     around GET CCCs
   - SETAASA device discovery support
   - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as
     well as I2C devices on I3C bus
   - IBI-based wakeup support

  Drivers:
   - dw: SETAASA support
   - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C
     controller support, PIO queue management support for HCI v1.2
   - renesas: improve suspend to RAM support, add runtime PM support"

* tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits)
  i3c: dw: reduce do_daa time if there's no client
  i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller
  i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2
  i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode
  i3c: dw: rename "pclk" to "apb" to match dt-binding
  i3c: dw: make struct dw_i3c_cmd smaller
  i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding
  i3c: renesas: Don't register devices when ENTDAA times out
  i3c: master: dw-i3c-master: fix OD timing for first broadcast
  i3c: mipi-i3c-hci: Advertise IBI wakeup capability
  i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev()
  i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI
  i3c: master: Reject IBI requests from non-IBI-capable devices
  i3c: master: Add helper to query bus wakeup requirements
  i3c: master: Report wakeup events for IBIs
  i3c: master: Support IBI-based wakeup capability
  i3c: master: Fix potential UAF in i3c_device_match()
  i3c: master: Fix potential UAF in i3c_device_uevent()
  i3c: Make dev->desc locking assumptions explicit
  i3c: master: Fix use-after-free of master->this
  ...

1 files changed, 429 insertions, 0 deletions

diff --git a/drivers/input/keyboard/bcm-keypad.c b/drivers/input/keyboard/bcm-keypad.c
new file mode 100644
index 000000000..6b46f83a9
--- /dev/null
+++ b/drivers/input/keyboard/bcm-keypad.c
@@ -0,0 +1,429 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright (C) 2014 Broadcom Corporation
+
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/gfp.h>
+#include <linux/io.h>
+#include <linux/input.h>
+#include <linux/input/matrix_keypad.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/stddef.h>
+#include <linux/types.h>
+
+#define DEFAULT_CLK_HZ			31250
+#define MAX_ROWS			8
+#define MAX_COLS			8
+
+/* Register/field definitions */
+#define KPCR_OFFSET			0x00000080
+#define KPCR_MODE			0x00000002
+#define KPCR_MODE_SHIFT			1
+#define KPCR_MODE_MASK			1
+#define KPCR_ENABLE			0x00000001
+#define KPCR_STATUSFILTERENABLE		0x00008000
+#define KPCR_STATUSFILTERTYPE_SHIFT	12
+#define KPCR_COLFILTERENABLE		0x00000800
+#define KPCR_COLFILTERTYPE_SHIFT	8
+#define KPCR_ROWWIDTH_SHIFT		20
+#define KPCR_COLUMNWIDTH_SHIFT		16
+
+#define KPIOR_OFFSET			0x00000084
+#define KPIOR_ROWOCONTRL_SHIFT		24
+#define KPIOR_ROWOCONTRL_MASK		0xFF000000
+#define KPIOR_COLUMNOCONTRL_SHIFT	16
+#define KPIOR_COLUMNOCONTRL_MASK	0x00FF0000
+#define KPIOR_COLUMN_IO_DATA_SHIFT	0
+
+#define KPEMR0_OFFSET			0x00000090
+#define KPEMR1_OFFSET			0x00000094
+#define KPEMR2_OFFSET			0x00000098
+#define KPEMR3_OFFSET			0x0000009C
+#define KPEMR_EDGETYPE_BOTH		3
+
+#define KPSSR0_OFFSET			0x000000A0
+#define KPSSR1_OFFSET			0x000000A4
+#define KPSSRN_OFFSET(reg_n)		(KPSSR0_OFFSET + 4 * (reg_n))
+#define KPIMR0_OFFSET			0x000000B0
+#define KPIMR1_OFFSET			0x000000B4
+#define KPICR0_OFFSET			0x000000B8
+#define KPICR1_OFFSET			0x000000BC
+#define KPICRN_OFFSET(reg_n)		(KPICR0_OFFSET + 4 * (reg_n))
+#define KPISR0_OFFSET			0x000000C0
+#define KPISR1_OFFSET			0x000000C4
+
+#define KPCR_STATUSFILTERTYPE_MAX	7
+#define KPCR_COLFILTERTYPE_MAX		7
+
+/* Macros to determine the row/column from a bit that is set in SSR0/1. */
+#define BIT_TO_ROW_SSRN(bit_nr, reg_n)	(((bit_nr) >> 3) + 4 * (reg_n))
+#define BIT_TO_COL(bit_nr)		((bit_nr) % 8)
+
+/* Structure representing various run-time entities */
+struct bcm_kp {
+	void __iomem *base;
+	int irq;
+	struct clk *clk;
+	struct input_dev *input_dev;
+	unsigned long last_state[2];
+	unsigned int n_rows;
+	unsigned int n_cols;
+	u32 kpcr;
+	u32 kpior;
+	u32 kpemr;
+	u32 imr0_val;
+	u32 imr1_val;
+};
+
+/*
+ * Returns the keycode from the input device keymap given the row and
+ * column.
+ */
+static int bcm_kp_get_keycode(struct bcm_kp *kp, int row, int col)
+{
+	unsigned int row_shift = get_count_order(kp->n_cols);
+	unsigned short *keymap = kp->input_dev->keycode;
+
+	return keymap[MATRIX_SCAN_CODE(row, col, row_shift)];
+}
+
+static void bcm_kp_report_keys(struct bcm_kp *kp, int reg_num, int pull_mode)
+{
+	unsigned long state, change;
+	int bit_nr;
+	int key_press;
+	int row, col;
+	unsigned int keycode;
+
+	/* Clear interrupts */
+	writel(0xFFFFFFFF, kp->base + KPICRN_OFFSET(reg_num));
+
+	state = readl(kp->base + KPSSRN_OFFSET(reg_num));
+	change = kp->last_state[reg_num] ^ state;
+	kp->last_state[reg_num] = state;
+
+	for_each_set_bit(bit_nr, &change, BITS_PER_LONG) {
+		key_press = state & BIT(bit_nr);
+		/* The meaning of SSR register depends on pull mode. */
+		key_press = pull_mode ? !key_press : key_press;
+		row = BIT_TO_ROW_SSRN(bit_nr, reg_num);
+		col = BIT_TO_COL(bit_nr);
+		keycode = bcm_kp_get_keycode(kp, row, col);
+		input_report_key(kp->input_dev, keycode, key_press);
+	}
+}
+
+static irqreturn_t bcm_kp_isr_thread(int irq, void *dev_id)
+{
+	struct bcm_kp *kp = dev_id;
+	int pull_mode = (kp->kpcr >> KPCR_MODE_SHIFT) & KPCR_MODE_MASK;
+	int reg_num;
+
+	for (reg_num = 0; reg_num <= 1; reg_num++)
+		bcm_kp_report_keys(kp, reg_num, pull_mode);
+
+	input_sync(kp->input_dev);
+
+	return IRQ_HANDLED;
+}
+
+static int bcm_kp_start(struct bcm_kp *kp)
+{
+	int error;
+
+	if (kp->clk) {
+		error = clk_prepare_enable(kp->clk);
+		if (error)
+			return error;
+	}
+
+	writel(kp->kpior, kp->base + KPIOR_OFFSET);
+
+	writel(kp->imr0_val, kp->base + KPIMR0_OFFSET);
+	writel(kp->imr1_val, kp->base + KPIMR1_OFFSET);
+
+	writel(kp->kpemr, kp->base + KPEMR0_OFFSET);
+	writel(kp->kpemr, kp->base + KPEMR1_OFFSET);
+	writel(kp->kpemr, kp->base + KPEMR2_OFFSET);
+	writel(kp->kpemr, kp->base + KPEMR3_OFFSET);
+
+	writel(0xFFFFFFFF, kp->base + KPICR0_OFFSET);
+	writel(0xFFFFFFFF, kp->base + KPICR1_OFFSET);
+
+	kp->last_state[0] = readl(kp->base + KPSSR0_OFFSET);
+	kp->last_state[0] = readl(kp->base + KPSSR1_OFFSET);
+
+	writel(kp->kpcr | KPCR_ENABLE, kp->base + KPCR_OFFSET);
+
+	return 0;
+}
+
+static void bcm_kp_stop(const struct bcm_kp *kp)
+{
+	u32 val;
+
+	val = readl(kp->base + KPCR_OFFSET);
+	val &= ~KPCR_ENABLE;
+	writel(0, kp->base + KPCR_OFFSET);
+	writel(0, kp->base + KPIMR0_OFFSET);
+	writel(0, kp->base + KPIMR1_OFFSET);
+	writel(0xFFFFFFFF, kp->base + KPICR0_OFFSET);
+	writel(0xFFFFFFFF, kp->base + KPICR1_OFFSET);
+
+	clk_disable_unprepare(kp->clk);
+}
+
+static int bcm_kp_open(struct input_dev *dev)
+{
+	struct bcm_kp *kp = input_get_drvdata(dev);
+
+	return bcm_kp_start(kp);
+}
+
+static void bcm_kp_close(struct input_dev *dev)
+{
+	struct bcm_kp *kp = input_get_drvdata(dev);
+
+	bcm_kp_stop(kp);
+}
+
+static int bcm_kp_matrix_key_parse_dt(struct bcm_kp *kp)
+{
+	struct device *dev = kp->input_dev->dev.parent;
+	struct device_node *np = dev->of_node;
+	int error;
+	unsigned int dt_val;
+	unsigned int i;
+	unsigned int num_rows, col_mask, rows_set;
+
+	/* Initialize the KPCR Keypad Configuration Register */
+	kp->kpcr = KPCR_STATUSFILTERENABLE | KPCR_COLFILTERENABLE;
+
+	error = matrix_keypad_parse_properties(dev, &kp->n_rows, &kp->n_cols);
+	if (error) {
+		dev_err(dev, "failed to parse kp params\n");
+		return error;
+	}
+
+	/* Set row width for the ASIC block. */
+	kp->kpcr |= (kp->n_rows - 1) << KPCR_ROWWIDTH_SHIFT;
+
+	/* Set column width for the ASIC block. */
+	kp->kpcr |= (kp->n_cols - 1) << KPCR_COLUMNWIDTH_SHIFT;
+
+	/* Configure the IMR registers */
+
+	/*
+	 * IMR registers contain interrupt enable bits for 8x8 matrix
+	 * IMR0 register format: <row3> <row2> <row1> <row0>
+	 * IMR1 register format: <row7> <row6> <row5> <row4>
+	 */
+	col_mask = (1 << (kp->n_cols)) - 1;
+	num_rows = kp->n_rows;
+
+	/* Set column bits in rows 0 to 3 in IMR0 */
+	kp->imr0_val = col_mask;
+
+	rows_set = 1;
+	while (--num_rows && rows_set++ < 4)
+		kp->imr0_val |= kp->imr0_val << MAX_COLS;
+
+	/* Set column bits in rows 4 to 7 in IMR1 */
+	kp->imr1_val = 0;
+	if (num_rows) {
+		kp->imr1_val = col_mask;
+		while (--num_rows)
+			kp->imr1_val |= kp->imr1_val << MAX_COLS;
+	}
+
+	/* Initialize the KPEMR Keypress Edge Mode Registers */
+	/* Trigger on both edges */
+	kp->kpemr = 0;
+	for (i = 0; i <= 30; i += 2)
+		kp->kpemr |= (KPEMR_EDGETYPE_BOTH << i);
+
+	/*
+	 * Obtain the Status filter debounce value and verify against the
+	 * possible values specified in the DT binding.
+	 */
+	of_property_read_u32(np, "status-debounce-filter-period", &dt_val);
+
+	if (dt_val > KPCR_STATUSFILTERTYPE_MAX) {
+		dev_err(dev, "Invalid Status filter debounce value %d\n",
+			dt_val);
+		return -EINVAL;
+	}
+
+	kp->kpcr |= dt_val << KPCR_STATUSFILTERTYPE_SHIFT;
+
+	/*
+	 * Obtain the Column filter debounce value and verify against the
+	 * possible values specified in the DT binding.
+	 */
+	of_property_read_u32(np, "col-debounce-filter-period", &dt_val);
+
+	if (dt_val > KPCR_COLFILTERTYPE_MAX) {
+		dev_err(dev, "Invalid Column filter debounce value %d\n",
+			dt_val);
+		return -EINVAL;
+	}
+
+	kp->kpcr |= dt_val << KPCR_COLFILTERTYPE_SHIFT;
+
+	/*
+	 * Determine between the row and column,
+	 * which should be configured as output.
+	 */
+	if (of_property_read_bool(np, "row-output-enabled")) {
+		/*
+		* Set RowOContrl or ColumnOContrl in KPIOR
+		* to the number of pins to drive as outputs
+		*/
+		kp->kpior = ((1 << kp->n_rows) - 1) <<
+				KPIOR_ROWOCONTRL_SHIFT;
+	} else {
+		kp->kpior = ((1 << kp->n_cols) - 1) <<
+				KPIOR_COLUMNOCONTRL_SHIFT;
+	}
+
+	/*
+	 * Determine if the scan pull up needs to be enabled
+	 */
+	if (of_property_read_bool(np, "pull-up-enabled"))
+		kp->kpcr |= KPCR_MODE;
+
+	dev_dbg(dev, "n_rows=%d n_col=%d kpcr=%x kpior=%x kpemr=%x\n",
+		kp->n_rows, kp->n_cols,
+		kp->kpcr, kp->kpior, kp->kpemr);
+
+	return 0;
+}
+
+
+static int bcm_kp_probe(struct platform_device *pdev)
+{
+	struct bcm_kp *kp;
+	struct input_dev *input_dev;
+	int error;
+
+	kp = devm_kzalloc(&pdev->dev, sizeof(*kp), GFP_KERNEL);
+	if (!kp)
+		return -ENOMEM;
+
+	input_dev = devm_input_allocate_device(&pdev->dev);
+	if (!input_dev) {
+		dev_err(&pdev->dev, "failed to allocate the input device\n");
+		return -ENOMEM;
+	}
+
+	__set_bit(EV_KEY, input_dev->evbit);
+
+	/* Enable auto repeat feature of Linux input subsystem */
+	if (of_property_read_bool(pdev->dev.of_node, "autorepeat"))
+		__set_bit(EV_REP, input_dev->evbit);
+
+	input_dev->name = pdev->name;
+	input_dev->phys = "keypad/input0";
+	input_dev->dev.parent = &pdev->dev;
+	input_dev->open = bcm_kp_open;
+	input_dev->close = bcm_kp_close;
+
+	input_dev->id.bustype = BUS_HOST;
+	input_dev->id.vendor = 0x0001;
+	input_dev->id.product = 0x0001;
+	input_dev->id.version = 0x0100;
+
+	input_set_drvdata(input_dev, kp);
+
+	kp->input_dev = input_dev;
+
+	error = bcm_kp_matrix_key_parse_dt(kp);
+	if (error)
+		return error;
+
+	error = matrix_keypad_build_keymap(NULL, NULL,
+					   kp->n_rows, kp->n_cols,
+					   NULL, input_dev);
+	if (error) {
+		dev_err(&pdev->dev, "failed to build keymap\n");
+		return error;
+	}
+
+	kp->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(kp->base))
+		return PTR_ERR(kp->base);
+
+	/* Enable clock */
+	kp->clk = devm_clk_get_optional(&pdev->dev, "peri_clk");
+	if (IS_ERR(kp->clk)) {
+		return dev_err_probe(&pdev->dev, PTR_ERR(kp->clk), "Failed to get clock\n");
+	} else if (!kp->clk) {
+		dev_dbg(&pdev->dev, "No clock specified. Assuming it's enabled\n");
+	} else {
+		unsigned int desired_rate;
+		long actual_rate;
+
+		error = of_property_read_u32(pdev->dev.of_node,
+					     "clock-frequency", &desired_rate);
+		if (error < 0)
+			desired_rate = DEFAULT_CLK_HZ;
+
+		actual_rate = clk_round_rate(kp->clk, desired_rate);
+		if (actual_rate <= 0)
+			return -EINVAL;
+
+		error = clk_set_rate(kp->clk, actual_rate);
+		if (error)
+			return error;
+
+		error = clk_prepare_enable(kp->clk);
+		if (error)
+			return error;
+	}
+
+	/* Put the kp into a known sane state */
+	bcm_kp_stop(kp);
+
+	kp->irq = platform_get_irq(pdev, 0);
+	if (kp->irq < 0)
+		return -EINVAL;
+
+	error = devm_request_threaded_irq(&pdev->dev, kp->irq,
+					  NULL, bcm_kp_isr_thread,
+					  IRQF_ONESHOT, pdev->name, kp);
+	if (error) {
+		dev_err(&pdev->dev, "failed to request IRQ\n");
+		return error;
+	}
+
+	error = input_register_device(input_dev);
+	if (error) {
+		dev_err(&pdev->dev, "failed to register input device\n");
+		return error;
+	}
+
+	return 0;
+}
+
+static const struct of_device_id bcm_kp_of_match[] = {
+	{ .compatible = "brcm,bcm-keypad" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, bcm_kp_of_match);
+
+static struct platform_driver bcm_kp_device_driver = {
+	.probe		= bcm_kp_probe,
+	.driver		= {
+		.name	= "bcm-keypad",
+		.of_match_table = bcm_kp_of_match,
+	}
+};
+
+module_platform_driver(bcm_kp_device_driver);
+
+MODULE_AUTHOR("Broadcom Corporation");
+MODULE_DESCRIPTION("BCM Keypad Driver");
+MODULE_LICENSE("GPL v2");