* and Harald Koerfgen <hkoerfg@web.de>, which itself is derived from
* "HP300 Topcat framebuffer support (derived from macfb of all things)
* Phil Blundell <philb@gnu.org> 1998"
+ * Copyright (c) 2016 Maciej W. Rozycki
*
* 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
*
* 2003-09-21 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de>
* Hardware cursor support.
+ *
+ * 2016-02-21 Maciej W. Rozycki <macro@linux-mips.org>
+ * Version 0.03: Rewritten for the new FB and TC APIs.
*/
-#include <linux/module.h>
-#include <linux/kernel.h>
+
+#include <linux/compiler.h>
#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/delay.h>
-#include <linux/init.h>
#include <linux/fb.h>
-#include <linux/console.h>
-
-#include <asm/bootinfo.h>
-#include <asm/dec/machtype.h>
-#include <asm/dec/tc.h>
-
-#include <video/fbcon.h>
-#include <video/fbcon-cfb8.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/tc.h>
+#include <linux/timer.h>
#include "bt455.h"
#include "bt431.h"
/* Version information */
-#define DRIVER_VERSION "0.02"
+#define DRIVER_VERSION "0.03"
#define DRIVER_AUTHOR "Karsten Merker <merker@linuxtag.org>"
#define DRIVER_DESCRIPTION "PMAG-AA Framebuffer Driver"
-/* Prototypes */
-static int aafb_set_var(struct fb_var_screeninfo *var, int con,
- struct fb_info *info);
-
/*
* Bt455 RAM DAC register base offset (rel. to TC slot base address).
*/
*/
#define PMAG_AA_ONBOARD_FBMEM_OFFSET 0x200000
-struct aafb_cursor {
- struct timer_list timer;
- int enable;
- int on;
- int vbl_cnt;
- int blink_rate;
- u16 x, y, width, height;
+struct aafb_par {
+ void __iomem *mmio;
+ struct bt455_regs __iomem *bt455;
+ struct bt431_regs __iomem *bt431;
};
-#define CURSOR_TIMER_FREQ (HZ / 50)
-#define CURSOR_BLINK_RATE (20)
-#define CURSOR_DRAW_DELAY (2)
-
-struct aafb_info {
- struct fb_info info;
- struct display disp;
- struct aafb_cursor cursor;
- struct bt455_regs *bt455;
- struct bt431_regs *bt431;
- unsigned long fb_start;
- unsigned long fb_size;
- unsigned long fb_line_length;
+static struct fb_var_screeninfo aafb_defined = {
+ .xres = 1280,
+ .yres = 1024,
+ .xres_virtual = 2048,
+ .yres_virtual = 1024,
+ .bits_per_pixel = 8,
+ .grayscale = 1,
+ .red.length = 0,
+ .green.length = 1,
+ .blue.length = 0,
+ .activate = FB_ACTIVATE_NOW,
+ .accel_flags = FB_ACCEL_NONE,
+ .sync = FB_SYNC_ON_GREEN,
+ .vmode = FB_VMODE_NONINTERLACED,
};
-/*
- * Max 3 TURBOchannel slots -> max 3 PMAG-AA.
- */
-static struct aafb_info my_fb_info[3];
-
-static struct aafb_par {
-} current_par;
-
-static int currcon = -1;
-
-static void aafb_set_cursor(struct aafb_info *info, int on)
-{
- struct aafb_cursor *c = &info->cursor;
-
- if (on) {
- bt431_position_cursor(info->bt431, c->x, c->y);
- bt431_enable_cursor(info->bt431);
- } else
- bt431_erase_cursor(info->bt431);
-}
-
-static void aafbcon_cursor(struct display *disp, int mode, int x, int y)
-{
- struct aafb_info *info = (struct aafb_info *)disp->fb_info;
- struct aafb_cursor *c = &info->cursor;
-
- x *= fontwidth(disp);
- y *= fontheight(disp);
-
- if (c->x == x && c->y == y && (mode == CM_ERASE) == !c->enable)
- return;
-
- c->enable = 0;
- if (c->on)
- aafb_set_cursor(info, 0);
- c->x = x - disp->var.xoffset;
- c->y = y - disp->var.yoffset;
-
- switch (mode) {
- case CM_ERASE:
- c->on = 0;
- break;
- case CM_DRAW:
- case CM_MOVE:
- if (c->on)
- aafb_set_cursor(info, c->on);
- else
- c->vbl_cnt = CURSOR_DRAW_DELAY;
- c->enable = 1;
- break;
- }
-}
+static struct fb_fix_screeninfo aafb_fix = {
+ .id = "PMAG-AA",
+ .smem_len = (2048 * 1024),
+ .type = FB_TYPE_PACKED_PIXELS,
+ .visual = FB_VISUAL_MONO10,
+ .ypanstep = 1,
+ .ywrapstep = 1,
+ .line_length = 2048,
+ .mmio_len = PMAG_AA_ONBOARD_FBMEM_OFFSET - PMAG_AA_BT455_OFFSET,
+};
-static int aafbcon_set_font(struct display *disp, int width, int height)
+static int aafb_cursor(struct fb_info *info, struct fb_cursor *cursor)
{
- struct aafb_info *info = (struct aafb_info *)disp->fb_info;
- struct aafb_cursor *c = &info->cursor;
- u8 fgc = ~attr_bgcol_ec(disp, disp->conp, &info->info);
+ struct aafb_par *par = info->par;
- if (width > 64 || height > 64 || width < 0 || height < 0)
+ if (cursor->image.height > BT431_CURSOR_SIZE ||
+ cursor->image.width > BT431_CURSOR_SIZE) {
+ bt431_erase_cursor(par->bt431);
return -EINVAL;
-
- c->height = height;
- c->width = width;
-
- bt431_set_font(info->bt431, fgc, width, height);
-
- return 1;
-}
-
-static void aafb_cursor_timer_handler(unsigned long data)
-{
- struct aafb_info *info = (struct aafb_info *)data;
- struct aafb_cursor *c = &info->cursor;
-
- if (!c->enable)
- goto out;
-
- if (c->vbl_cnt && --c->vbl_cnt == 0) {
- c->on ^= 1;
- aafb_set_cursor(info, c->on);
- c->vbl_cnt = c->blink_rate;
}
-out:
- c->timer.expires = jiffies + CURSOR_TIMER_FREQ;
- add_timer(&c->timer);
-}
-
-static void __init aafb_cursor_init(struct aafb_info *info)
-{
- struct aafb_cursor *c = &info->cursor;
-
- c->enable = 1;
- c->on = 1;
- c->x = c->y = 0;
- c->width = c->height = 0;
- c->vbl_cnt = CURSOR_DRAW_DELAY;
- c->blink_rate = CURSOR_BLINK_RATE;
-
- init_timer(&c->timer);
- c->timer.data = (unsigned long)info;
- c->timer.function = aafb_cursor_timer_handler;
- mod_timer(&c->timer, jiffies + CURSOR_TIMER_FREQ);
-}
-
-static void __exit aafb_cursor_exit(struct aafb_info *info)
-{
- struct aafb_cursor *c = &info->cursor;
-
- del_timer_sync(&c->timer);
-}
-
-static struct display_switch aafb_switch8 = {
- .setup = fbcon_cfb8_setup,
- .bmove = fbcon_cfb8_bmove,
- .clear = fbcon_cfb8_clear,
- .putc = fbcon_cfb8_putc,
- .putcs = fbcon_cfb8_putcs,
- .revc = fbcon_cfb8_revc,
- .cursor = aafbcon_cursor,
- .set_font = aafbcon_set_font,
- .clear_margins = fbcon_cfb8_clear_margins,
- .fontwidthmask = FONTWIDTH(4)|FONTWIDTH(8)|FONTWIDTH(12)|FONTWIDTH(16)
-};
-
-static void aafb_get_par(struct aafb_par *par)
-{
- *par = current_par;
-}
-
-static int aafb_get_fix(struct fb_fix_screeninfo *fix, int con,
- struct fb_info *info)
-{
- struct aafb_info *ip = (struct aafb_info *)info;
-
- memset(fix, 0, sizeof(struct fb_fix_screeninfo));
- strcpy(fix->id, "PMAG-AA");
- fix->smem_start = ip->fb_start;
- fix->smem_len = ip->fb_size;
- fix->type = FB_TYPE_PACKED_PIXELS;
- fix->ypanstep = 1;
- fix->ywrapstep = 1;
- fix->visual = FB_VISUAL_MONO10;
- fix->line_length = 1280;
- fix->accel = FB_ACCEL_NONE;
+ if (!cursor->enable)
+ bt431_erase_cursor(par->bt431);
- return 0;
-}
+ if (cursor->set & FB_CUR_SETPOS)
+ bt431_position_cursor(par->bt431,
+ cursor->image.dx, cursor->image.dy);
+ if (cursor->set & FB_CUR_SETCMAP) {
+ u8 fg = cursor->image.fg_color ? 0xf : 0x0;
+ u8 bg = cursor->image.bg_color ? 0xf : 0x0;
-static void aafb_set_disp(struct display *disp, int con,
- struct aafb_info *info)
-{
- struct fb_fix_screeninfo fix;
-
- disp->fb_info = &info->info;
- aafb_set_var(&disp->var, con, &info->info);
- if (disp->conp && disp->conp->vc_sw && disp->conp->vc_sw->con_cursor)
- disp->conp->vc_sw->con_cursor(disp->conp, CM_ERASE);
- disp->dispsw = &aafb_switch8;
- disp->dispsw_data = 0;
-
- aafb_get_fix(&fix, con, &info->info);
- disp->screen_base = (u8 *) fix.smem_start;
- disp->visual = fix.visual;
- disp->type = fix.type;
- disp->type_aux = fix.type_aux;
- disp->ypanstep = fix.ypanstep;
- disp->ywrapstep = fix.ywrapstep;
- disp->line_length = fix.line_length;
- disp->next_line = 2048;
- disp->can_soft_blank = 1;
- disp->inverse = 0;
- disp->scrollmode = SCROLL_YREDRAW;
-
- aafbcon_set_font(disp, fontwidth(disp), fontheight(disp));
-}
+ bt455_write_cmap_entry(par->bt455, 8, 0, bg, 0);
+ bt455_write_cmap_entry(par->bt455, 9, 0, bg, 0);
+ bt455_write_ovly_entry(par->bt455, 0, 0, fg, 0);
+ }
+ if (cursor->set & (FB_CUR_SETSIZE | FB_CUR_SETSHAPE | FB_CUR_SETIMAGE))
+ bt431_set_cursor(par->bt431,
+ cursor->image.data, cursor->mask, cursor->rop,
+ cursor->image.width, cursor->image.height);
-static int aafb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
- struct fb_info *info)
-{
- static u16 color[2] = {0x0000, 0x000f};
- static struct fb_cmap aafb_cmap = {0, 2, color, color, color, NULL};
+ if (cursor->enable)
+ bt431_enable_cursor(par->bt431);
- fb_copy_cmap(&aafb_cmap, cmap, kspc ? 0 : 2);
return 0;
}
-static int aafb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
- struct fb_info *info)
-{
- u16 color[2] = {0x0000, 0x000f};
-
- if (cmap->start == 0
- && cmap->len == 2
- && memcmp(cmap->red, color, sizeof(color)) == 0
- && memcmp(cmap->green, color, sizeof(color)) == 0
- && memcmp(cmap->blue, color, sizeof(color)) == 0
- && cmap->transp == NULL)
- return 0;
- else
- return -EINVAL;
-}
-
-static int aafb_ioctl(struct fb_info *info, u32 cmd, unsigned long arg)
-{
- /* TODO: Not yet implemented */
- return -ENOIOCTLCMD;
-}
+/* 0 unblanks, any other blanks. */
-static int aafb_switch(int con, struct fb_info *info)
+static int aafb_blank(int blank, struct fb_info *info)
{
- struct aafb_info *ip = (struct aafb_info *)info;
- struct display *old = (currcon < 0) ? &ip->disp : (fb_display + currcon);
- struct display *new = (con < 0) ? &ip->disp : (fb_display + con);
-
- if (old->conp && old->conp->vc_sw && old->conp->vc_sw->con_cursor)
- old->conp->vc_sw->con_cursor(old->conp, CM_ERASE);
-
- /* Set the current console. */
- currcon = con;
- aafb_set_disp(new, con, ip);
+ struct aafb_par *par = info->par;
+ u8 val = blank ? 0x00 : 0x0f;
+ bt455_write_cmap_entry(par->bt455, 1, val, val, val);
return 0;
}
-static void aafb_encode_var(struct fb_var_screeninfo *var,
- struct aafb_par *par)
-{
- var->xres = 1280;
- var->yres = 1024;
- var->xres_virtual = 2048;
- var->yres_virtual = 1024;
- var->xoffset = 0;
- var->yoffset = 0;
- var->bits_per_pixel = 8;
- var->grayscale = 1;
- var->red.offset = 0;
- var->red.length = 0;
- var->red.msb_right = 0;
- var->green.offset = 0;
- var->green.length = 1;
- var->green.msb_right = 0;
- var->blue.offset = 0;
- var->blue.length = 0;
- var->blue.msb_right = 0;
- var->transp.offset = 0;
- var->transp.length = 0;
- var->transp.msb_right = 0;
- var->nonstd = 0;
- var->activate &= ~FB_ACTIVATE_MASK & FB_ACTIVATE_NOW;
- var->accel_flags = 0;
- var->sync = FB_SYNC_ON_GREEN;
- var->vmode &= ~FB_VMODE_MASK & FB_VMODE_NONINTERLACED;
-}
+static struct fb_ops aafb_ops = {
+ .owner = THIS_MODULE,
+ .fb_blank = aafb_blank,
+ .fb_fillrect = cfb_fillrect,
+ .fb_copyarea = cfb_copyarea,
+ .fb_imageblit = cfb_imageblit,
+ .fb_cursor = aafb_cursor,
+};
-static int aafb_get_var(struct fb_var_screeninfo *var, int con,
- struct fb_info *info)
+static int pmagaafb_probe(struct device *dev)
{
- if (con < 0) {
- struct aafb_par par;
-
- memset(var, 0, sizeof(struct fb_var_screeninfo));
- aafb_get_par(&par);
- aafb_encode_var(var, &par);
- } else
- *var = info->var;
+ struct tc_dev *tdev = to_tc_dev(dev);
+ resource_size_t start, len;
+ struct fb_info *info;
+ struct aafb_par *par;
+ int err;
+
+ info = framebuffer_alloc(sizeof(struct aafb_par), dev);
+ if (!info) {
+ printk(KERN_ERR "%s: Cannot allocate memory\n", dev_name(dev));
+ return -ENOMEM;
+ }
- return 0;
-}
+ par = info->par;
+ dev_set_drvdata(dev, info);
+
+ info->fbops = &aafb_ops;
+ info->fix = aafb_fix;
+ info->var = aafb_defined;
+ info->flags = FBINFO_DEFAULT;
+
+ /* Request the I/O MEM resource. */
+ start = tdev->resource.start;
+ len = tdev->resource.end - start + 1;
+ if (!request_mem_region(start, len, dev_name(dev))) {
+ printk(KERN_ERR "%s: Cannot reserve FB region\n",
+ dev_name(dev));
+ err = -EBUSY;
+ goto err_alloc;
+ }
-static int aafb_set_var(struct fb_var_screeninfo *var, int con,
- struct fb_info *info)
-{
- struct aafb_par par;
+ /* MMIO mapping setup. */
+ info->fix.mmio_start = start + PMAG_AA_BT455_OFFSET;
+ par->mmio = ioremap_nocache(info->fix.mmio_start, info->fix.mmio_len);
+ if (!par->mmio) {
+ printk(KERN_ERR "%s: Cannot map MMIO\n", dev_name(dev));
+ err = -ENOMEM;
+ goto err_resource;
+ }
+ par->bt455 = par->mmio - PMAG_AA_BT455_OFFSET + PMAG_AA_BT455_OFFSET;
+ par->bt431 = par->mmio - PMAG_AA_BT455_OFFSET + PMAG_AA_BT431_OFFSET;
+
+ /* Frame buffer mapping setup. */
+ info->fix.smem_start = start + PMAG_AA_ONBOARD_FBMEM_OFFSET;
+ info->screen_base = ioremap_nocache(info->fix.smem_start,
+ info->fix.smem_len);
+ if (!info->screen_base) {
+ printk(KERN_ERR "%s: Cannot map FB\n", dev_name(dev));
+ err = -ENOMEM;
+ goto err_mmio_map;
+ }
+ info->screen_size = info->fix.smem_len;
- aafb_get_par(&par);
- aafb_encode_var(var, &par);
- info->var = *var;
+ /* Init colormap. */
+ bt455_write_cmap_entry(par->bt455, 0, 0x00, 0x00, 0x00);
+ bt455_write_cmap_entry(par->bt455, 1, 0x0f, 0x0f, 0x0f);
- return 0;
-}
+ /* Init hardware cursor. */
+ bt431_erase_cursor(par->bt431);
+ bt431_init_cursor(par->bt431);
+
+ err = register_framebuffer(info);
+ if (err < 0) {
+ printk(KERN_ERR "%s: Cannot register framebuffer\n",
+ dev_name(dev));
+ goto err_smem_map;
+ }
-static int aafb_update_var(int con, struct fb_info *info)
-{
- struct aafb_info *ip = (struct aafb_info *)info;
- struct display *disp = (con < 0) ? &ip->disp : (fb_display + con);
+ get_device(dev);
- if (con == currcon)
- aafbcon_cursor(disp, CM_ERASE, ip->cursor.x, ip->cursor.y);
+ pr_info("fb%d: %s frame buffer device at %s\n",
+ info->node, info->fix.id, dev_name(dev));
return 0;
-}
-/* 0 unblanks, any other blanks. */
-static void aafb_blank(int blank, struct fb_info *info)
-{
- struct aafb_info *ip = (struct aafb_info *)info;
- u8 val = blank ? 0x00 : 0x0f;
+err_smem_map:
+ iounmap(info->screen_base);
- bt455_write_cmap_entry(ip->bt455, 1, val, val, val);
- aafbcon_cursor(&ip->disp, CM_ERASE, ip->cursor.x, ip->cursor.y);
-}
+err_mmio_map:
+ iounmap(par->mmio);
-static struct fb_ops aafb_ops = {
- .owner = THIS_MODULE,
- .fb_get_fix = aafb_get_fix,
- .fb_get_var = aafb_get_var,
- .fb_set_var = aafb_set_var,
- .fb_get_cmap = aafb_get_cmap,
- .fb_set_cmap = aafb_set_cmap,
- .fb_ioctl = aafb_ioctl
-};
+err_resource:
+ release_mem_region(start, len);
-static int __init init_one(int slot)
-{
- unsigned long base_addr = CKSEG1ADDR(get_tc_base_addr(slot));
- struct aafb_info *ip = &my_fb_info[slot];
-
- memset(ip, 0, sizeof(struct aafb_info));
-
- /*
- * Framebuffer display memory base address and friends.
- */
- ip->bt455 = (struct bt455_regs *) (base_addr + PMAG_AA_BT455_OFFSET);
- ip->bt431 = (struct bt431_regs *) (base_addr + PMAG_AA_BT431_OFFSET);
- ip->fb_start = base_addr + PMAG_AA_ONBOARD_FBMEM_OFFSET;
- ip->fb_size = 2048 * 1024; /* fb_fix_screeninfo.smem_length
- seems to be physical */
- ip->fb_line_length = 2048;
-
- /*
- * Let there be consoles..
- */
- strcpy(ip->info.modename, "PMAG-AA");
- ip->info.node = -1;
- ip->info.flags = FBINFO_FLAG_DEFAULT;
- ip->info.fbops = &aafb_ops;
- ip->info.disp = &ip->disp;
- ip->info.changevar = NULL;
- ip->info.switch_con = &aafb_switch;
- ip->info.updatevar = &aafb_update_var;
- ip->info.blank = &aafb_blank;
-
- aafb_set_disp(&ip->disp, currcon, ip);
-
- /*
- * Configure the RAM DACs.
- */
- bt455_erase_cursor(ip->bt455);
-
- /* Init colormap. */
- bt455_write_cmap_entry(ip->bt455, 0, 0x00, 0x00, 0x00);
- bt455_write_cmap_entry(ip->bt455, 1, 0x0f, 0x0f, 0x0f);
-
- /* Init hardware cursor. */
- bt431_init_cursor(ip->bt431);
- aafb_cursor_init(ip);
-
- /* Clear the screen. */
- memset ((void *)ip->fb_start, 0, ip->fb_size);
-
- if (register_framebuffer(&ip->info) < 0)
- return -EINVAL;
-
- printk(KERN_INFO "fb%d: %s frame buffer in TC slot %d\n",
- GET_FB_IDX(ip->info.node), ip->info.modename, slot);
-
- return 0;
+err_alloc:
+ framebuffer_release(info);
+ return err;
}
-static int __exit exit_one(int slot)
+static int __exit pmagaafb_remove(struct device *dev)
{
- struct aafb_info *ip = &my_fb_info[slot];
-
- if (unregister_framebuffer(&ip->info) < 0)
- return -EINVAL;
-
+ struct tc_dev *tdev = to_tc_dev(dev);
+ struct fb_info *info = dev_get_drvdata(dev);
+ struct aafb_par *par = info->par;
+ resource_size_t start, len;
+
+ put_device(dev);
+ unregister_framebuffer(info);
+ iounmap(info->screen_base);
+ iounmap(par->mmio);
+ start = tdev->resource.start;
+ len = tdev->resource.end - start + 1;
+ release_mem_region(start, len);
+ framebuffer_release(info);
return 0;
}
/*
* Initialise the framebuffer.
*/
-int __init pmagaafb_init(void)
-{
- int sid;
- int found = 0;
-
- while ((sid = search_tc_card("PMAG-AA")) >= 0) {
- found = 1;
- claim_tc_card(sid);
- init_one(sid);
- }
+static const struct tc_device_id pmagaafb_tc_table[] = {
+ { "DEC ", "PMAG-AA " },
+ { }
+};
+MODULE_DEVICE_TABLE(tc, pmagaafb_tc_table);
+
+static struct tc_driver pmagaafb_driver = {
+ .id_table = pmagaafb_tc_table,
+ .driver = {
+ .name = "pmagaafb",
+ .bus = &tc_bus_type,
+ .probe = pmagaafb_probe,
+ .remove = __exit_p(pmagaafb_remove),
+ },
+};
- return found ? 0 : -ENXIO;
+static int __init pmagaafb_init(void)
+{
+#ifndef MODULE
+ if (fb_get_options("pmagaafb", NULL))
+ return -ENXIO;
+#endif
+ return tc_register_driver(&pmagaafb_driver);
}
static void __exit pmagaafb_exit(void)
{
- int sid;
-
- while ((sid = search_tc_card("PMAG-AA")) >= 0) {
- exit_one(sid);
- release_tc_card(sid);
- }
+ tc_unregister_driver(&pmagaafb_driver);
}
+module_init(pmagaafb_init);
+module_exit(pmagaafb_exit);
+
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESCRIPTION);
MODULE_LICENSE("GPL");
-#ifdef MODULE
-module_init(pmagaafb_init);
-module_exit(pmagaafb_exit);
-#endif
projects / GitHub / LineageOS / G12 / android_kernel_amlogic_linux-4.9.git / commitdiff