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, 251 insertions, 0 deletions

diff --git a/drivers/video/fbdev/hecubafb.c b/drivers/video/fbdev/hecubafb.c
new file mode 100644
index 000000000..dd2af980f
--- /dev/null
+++ b/drivers/video/fbdev/hecubafb.c
@@ -0,0 +1,251 @@
+/*
+ * linux/drivers/video/hecubafb.c -- FB driver for Hecuba/Apollo controller
+ *
+ * Copyright (C) 2006, Jaya Kumar
+ * This work was sponsored by CIS(M) Sdn Bhd
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive for
+ * more details.
+ *
+ * Layout is based on skeletonfb.c by James Simmons and Geert Uytterhoeven.
+ * This work was possible because of apollo display code from E-Ink's website
+ * http://support.eink.com/community
+ * All information used to write this code is from public material made
+ * available by E-Ink on its support site. Some commands such as 0xA4
+ * were found by looping through cmd=0x00 thru 0xFF and supplying random
+ * values. There are other commands that the display is capable of,
+ * beyond the 5 used here but they are more complex.
+ *
+ * This driver is written to be used with the Hecuba display architecture.
+ * The actual display chip is called Apollo and the interface electronics
+ * it needs is called Hecuba.
+ *
+ * It is intended to be architecture independent. A board specific driver
+ * must be used to perform all the physical IO interactions. An example
+ * is provided as n411.c
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/vmalloc.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/list.h>
+#include <linux/uaccess.h>
+
+#include <video/hecubafb.h>
+
+/* Display specific information */
+#define DPY_W 600
+#define DPY_H 800
+
+static const struct fb_fix_screeninfo hecubafb_fix = {
+	.id =		"hecubafb",
+	.type =		FB_TYPE_PACKED_PIXELS,
+	.visual =	FB_VISUAL_MONO01,
+	.xpanstep =	0,
+	.ypanstep =	0,
+	.ywrapstep =	0,
+	.line_length =	DPY_W,
+	.accel =	FB_ACCEL_NONE,
+};
+
+static const struct fb_var_screeninfo hecubafb_var = {
+	.xres		= DPY_W,
+	.yres		= DPY_H,
+	.xres_virtual	= DPY_W,
+	.yres_virtual	= DPY_H,
+	.bits_per_pixel	= 1,
+	.nonstd		= 1,
+};
+
+/* main hecubafb functions */
+
+static void apollo_send_data(struct hecubafb_par *par, unsigned char data)
+{
+	/* set data */
+	par->board->set_data(par, data);
+
+	/* set DS low */
+	par->board->set_ctl(par, HCB_DS_BIT, 0);
+
+	/* wait for ack */
+	par->board->wait_for_ack(par, 0);
+
+	/* set DS hi */
+	par->board->set_ctl(par, HCB_DS_BIT, 1);
+
+	/* wait for ack to clear */
+	par->board->wait_for_ack(par, 1);
+}
+
+static void apollo_send_command(struct hecubafb_par *par, unsigned char data)
+{
+	/* command so set CD to high */
+	par->board->set_ctl(par, HCB_CD_BIT, 1);
+
+	/* actually strobe with command */
+	apollo_send_data(par, data);
+
+	/* clear CD back to low */
+	par->board->set_ctl(par, HCB_CD_BIT, 0);
+}
+
+static void hecubafb_dpy_update(struct hecubafb_par *par)
+{
+	int i;
+	unsigned char *buf = par->info->screen_buffer;
+
+	apollo_send_command(par, APOLLO_START_NEW_IMG);
+
+	for (i=0; i < (DPY_W*DPY_H/8); i++) {
+		apollo_send_data(par, *(buf++));
+	}
+
+	apollo_send_command(par, APOLLO_STOP_IMG_DATA);
+	apollo_send_command(par, APOLLO_DISPLAY_IMG);
+}
+
+/* this is called back from the deferred io workqueue */
+static void hecubafb_dpy_deferred_io(struct fb_info *info, struct list_head *pagereflist)
+{
+	hecubafb_dpy_update(info->par);
+}
+
+static void hecubafb_defio_damage_range(struct fb_info *info, off_t off, size_t len)
+{
+	struct hecubafb_par *par = info->par;
+
+	hecubafb_dpy_update(par);
+}
+
+static void hecubafb_defio_damage_area(struct fb_info *info, u32 x, u32 y,
+				       u32 width, u32 height)
+{
+	struct hecubafb_par *par = info->par;
+
+	hecubafb_dpy_update(par);
+}
+
+FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(hecubafb,
+				   hecubafb_defio_damage_range,
+				   hecubafb_defio_damage_area)
+
+static const struct fb_ops hecubafb_ops = {
+	.owner	= THIS_MODULE,
+	FB_DEFAULT_DEFERRED_OPS(hecubafb),
+};
+
+static struct fb_deferred_io hecubafb_defio = {
+	.delay		= HZ,
+	.deferred_io	= hecubafb_dpy_deferred_io,
+};
+
+static int hecubafb_probe(struct platform_device *dev)
+{
+	struct fb_info *info;
+	struct hecuba_board *board;
+	int retval = -ENOMEM;
+	int videomemorysize;
+	unsigned char *videomemory;
+	struct hecubafb_par *par;
+
+	/* pick up board specific routines */
+	board = dev->dev.platform_data;
+	if (!board)
+		return -EINVAL;
+
+	/* try to count device specific driver, if can't, platform recalls */
+	if (!try_module_get(board->owner))
+		return -ENODEV;
+
+	videomemorysize = (DPY_W*DPY_H)/8;
+
+	videomemory = vzalloc(videomemorysize);
+	if (!videomemory)
+		goto err_videomem_alloc;
+
+	info = framebuffer_alloc(sizeof(struct hecubafb_par), &dev->dev);
+	if (!info)
+		goto err_fballoc;
+
+	info->screen_buffer = videomemory;
+	info->fbops = &hecubafb_ops;
+
+	info->var = hecubafb_var;
+	info->fix = hecubafb_fix;
+	info->fix.smem_len = videomemorysize;
+	par = info->par;
+	par->info = info;
+	par->board = board;
+	par->send_command = apollo_send_command;
+	par->send_data = apollo_send_data;
+
+	info->flags = FBINFO_VIRTFB;
+
+	info->fbdefio = &hecubafb_defio;
+	retval = fb_deferred_io_init(info);
+	if (retval)
+		goto err_fbdefio;
+
+	retval = register_framebuffer(info);
+	if (retval < 0)
+		goto err_fbreg;
+	platform_set_drvdata(dev, info);
+
+	fb_info(info, "Hecuba frame buffer device, using %dK of video memory\n",
+		videomemorysize >> 10);
+
+	/* this inits the dpy */
+	retval = par->board->init(par);
+	if (retval < 0)
+		goto err_fbreg;
+
+	return 0;
+err_fbreg:
+	fb_deferred_io_cleanup(info);
+err_fbdefio:
+	framebuffer_release(info);
+err_fballoc:
+	vfree(videomemory);
+err_videomem_alloc:
+	module_put(board->owner);
+	return retval;
+}
+
+static void hecubafb_remove(struct platform_device *dev)
+{
+	struct fb_info *info = platform_get_drvdata(dev);
+
+	if (info) {
+		struct hecubafb_par *par = info->par;
+		fb_deferred_io_cleanup(info);
+		unregister_framebuffer(info);
+		vfree(info->screen_buffer);
+		if (par->board->remove)
+			par->board->remove(par);
+		module_put(par->board->owner);
+		framebuffer_release(info);
+	}
+}
+
+static struct platform_driver hecubafb_driver = {
+	.probe	= hecubafb_probe,
+	.remove	= hecubafb_remove,
+	.driver	= {
+		.name	= "hecubafb",
+	},
+};
+module_platform_driver(hecubafb_driver);
+
+MODULE_DESCRIPTION("fbdev driver for Hecuba/Apollo controller");
+MODULE_AUTHOR("Jaya Kumar");
+MODULE_LICENSE("GPL");