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Re: port-macppc/48600



The following reply was made to PR port-macppc/48600; it has been noted by GNATS.

From: scole_mail <scole_mail%gmx.com@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: port-macppc/48600
Date: Fri, 31 Jul 2015 14:02:46 -0400

 I've included an updated platinumfb.c file so the console will be 8
 bit, and built-in X config will be 16 bit.  The bpp depth can be
 changed by updating PLATINUM_FB_DEPTH and PLATINUM_CONSOLE_DEPTH, and
 re-compiling the kernel.  I tested X with a usb mouse and usb keyboard
 and the buttons seemed to all work with a recent build.
 
 I think the only things left to check in for this PR are the
 platinumfb files, and 601 bootxx.c/Locore.c changes for booting off
 the disk, which I tested and work fine (without wedges).
 
 I believe the PR could then be closed out once those are checked in.
 
 Thanks
 
 sys/arch/macppc/dev/platinumfb.c
 -----------------------------------------------------------------
 /*
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 /* A console driver for Apple's Platinum onboard video controller,
  * found in (all?) Catalyst logic boards including the Powermac 7200.
  *
  * Used valkyriefb.c from NetBSD, and platinumfb.c/platinumfb.h from
  * Linux sources as templates.
  *
  * Platinum is broken regarding openfirmware video variables.  In OF,
  * for a powermac 7200, doing "dev /platinum .properties" results in:
  *
  *	name                    platinum
  *	device_type             display
  *	model                   AAPL,343S1184
  *	AAPL,connector          monitor
  *	reg                     F8000000  00000800
  *	                        F1000000  01000000
  *	AAPL,interrupts         0000001E
  *
  * The first reg is the register set, and the second is for the
  * framebuffer.  There is also a set of colormap registers hardcoded
  * in platinumfbreg.h that (I think) aren't in openfirmware.
  *
  * powermac 7200 VRAM min and max limits are 1 and 4 Mb respectively.
  * OF claims 16M so we don't use that value.  If other machines can
  * can have more or less VRAM this code will need to be modified
  */
 
 #include <sys/cdefs.h>
 __KERNEL_RCSID(0, "$NetBSD: platinumfb.c,v 1.1 2014/10/31 12:00:00 macallan Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/kernel.h>
 #include <sys/device.h>
 
 #include <uvm/uvm_param.h>
 
 #include <dev/ofw/openfirm.h>
 
 #include <machine/autoconf.h>
 #include <machine/pio.h>
 
 #include <dev/wscons/wsdisplayvar.h>
 #include <dev/wscons/wsconsio.h>
 #include <dev/wsfont/wsfont.h>
 #include <dev/rasops/rasops.h>
 #include <dev/wscons/wsdisplay_vconsvar.h>
 
 #include <dev/videomode/videomode.h>
 
 #include <arch/macppc/dev/platinumfbreg.h>
 
 #include <sys/sysctl.h>
 
 #include "opt_wsemul.h"
 
 /*
  * here is a link of supported modes and resolutions:
  *  https://support.apple.com/kb/SP343?locale=en_US
  *
  * default console and X bpp/depth for built-in X config file,
  * select 8 or 16 or 32. 
  *
  */
 #define PLATINUM_CONSOLE_DEPTH 8
 #define PLATINUM_FB_DEPTH      16
 
 /*
  * resolution, from one of platinumfb_setting vmode_name's.
  */
 #define PLATINUM_FB_VMODE "800x600x75"
 
 struct platinumfb_setting {
         char vmode_name[24];
 	int32_t width;
 	int32_t height;
     	uint8_t freq;
 	uint8_t macmode;
 
 	int32_t	pitch[3];
 	uint32_t regs[26];
 	uint8_t offset[3];
 	uint8_t mode[3];
 	uint8_t dacula_ctrl[3];
 	uint8_t clock_params[2][2];
 };
 
 struct platinumfb_softc {
 	device_t sc_dev;
 	int sc_node;
 
         uint8_t *sc_reg;
 	uint32_t sc_reg_size;
 
     	uint8_t *sc_cmap;
 	uint32_t sc_cmap_size;
 
 	uint8_t *sc_fb;
 	uint32_t sc_fb_size;
 
 	int sc_depth;
 	int sc_width, sc_height, sc_linebytes;
 	const struct videomode *sc_videomode;
 	uint8_t sc_modereg;
 
         int sc_mode;
 		
 	u_char sc_cmap_red[256];
 	u_char sc_cmap_green[256];
 	u_char sc_cmap_blue[256];
 
 	struct vcons_data vd;
 
         uint8_t sc_cmode;
         uint8_t sc_dac_type;
         uint32_t sc_vram;
         int sc_on;
         struct platinumfb_setting *sc_pfs;
 };
 
 #define DIV2	0x20
 #define DIV4	0x40
 #define DIV8	0x60
 #define DIV16	0x80
 
 static struct platinumfb_setting platinum_5 = {
     "640x480x60",
     640, 480, 60, 5,
     { 672, 1312, 2592 },
     { 0xff0, 4, 0, 0, 0, 0, 0x320, 0,
       0, 0x15e, 0xc8, 0x18, 0x18f, 0x2f, 0x35, 0x3e,
       0x42, 0x182, 0x18e, 0x41a, 0x418, 2, 7, 0x44,
       0x404, 0x408 }, { 0x34, 0x3c, 0x41 },
     { 2, 0, 0xff }, { 0x11, 0x15, 0x19 },
     {{ 26, 0 + DIV8 }, { 14, 2 + DIV4 }}
 };
 
 static struct platinumfb_setting platinum_12 = {
     "800x600x75",
     800, 600, 75, 12,
     { 832, 1632, 3232 },
     { 0xff0, 4, 0, 0, 0, 0, 0x320, 0,
       0, 0x1ce, 0x108, 0x14, 0x20f, 0x27, 0x30, 0x39,
       0x72, 0x202, 0x20e, 0x4e2, 0x4e0, 4, 9, 0x2e,
       0x4de, 0x4df }, { 0x64, 0x6c, 0x71 },
     { 2, 0, 0xff }, { 0x11, 0x15, 0x19 },
     {{ 122, 7 + DIV4 }, { 62, 9 + DIV2 }}
 };
 
 static struct platinumfb_setting platinum_14 = {
     "1024x768x60",
     1024, 768, 60, 14,
     { 1056, 2080, 4128 },
     { 0xff0, 4, 0, 0, 0, 0, 0x320, 0,
       0, 0x25a, 0x14f, 0x22, 0x29f, 0x43, 0x49, 0x5b,
       0x8e, 0x28e, 0x29e, 0x64c, 0x64a, 0xa, 0xf, 0x44,
       0x644, 0x646 }, { 0x80, 0x88, 0x8d },
     { 2, 0, 0xff }, { 0x11, 0x15, 0x19 },
     {{ 71, 6 + DIV2 }, { 118, 13 + DIV2 }}
 };
 
 static struct platinumfb_setting platinum_20 = {
     "1280x1024x75",
     1280, 1024, 75, 20,
     { 1312, 2592, 2592 },
     { 0xffc, 4, 0, 0, 0, 0, 0x428, 0,
       0, 0xb3, 0xd3, 0x12, 0x1a5, 0x23, 0x28, 0x2d,
       0x5e, 0x19e, 0x1a4, 0x854, 0x852, 4, 9, 0x50,
       0x850, 0x851 }, { 0x58, 0x5d, 0x5d },
     { 0, 0xff, 0xff }, { 0x51, 0x55, 0x55 },
     {{ 45, 3 }, { 66, 7 }}
 };
 
 static struct platinumfb_setting *pfb_setting[] = {
     &platinum_5,
     &platinum_12,
     &platinum_14,
     &platinum_20
 };
 
 static struct vcons_screen platinumfb_console_screen;
 
 static int	platinumfb_match(device_t, cfdata_t, void *);
 static void	platinumfb_attach(device_t, device_t, void *);
 
 CFATTACH_DECL_NEW(platinumfb, sizeof(struct platinumfb_softc),
     platinumfb_match, platinumfb_attach, NULL, NULL);
 
 static int	platinumfb_init(device_t);
 static int 	platinumfb_set_mode(struct platinumfb_softc *,
 				    const struct videomode *, int);
 static void     platinumfb_set_rasops(struct platinumfb_softc *,
 				      struct rasops_info *, int);
 static int	platinumfb_ioctl(void *, void *, u_long, void *, int,
 				 struct lwp *);
 static paddr_t	platinumfb_mmap(void *, void *, off_t, int);
 static void	platinumfb_init_screen(void *, struct vcons_screen *, int,
 				       long *);
 static int	platinumfb_putcmap(struct platinumfb_softc *,
 				   struct wsdisplay_cmap *);
 static int 	platinumfb_getcmap(struct platinumfb_softc *,
 				   struct wsdisplay_cmap *);
 static void	platinumfb_init_cmap(struct platinumfb_softc *);
 static void	platinumfb_restore_palette(struct platinumfb_softc *);
 static void	platinumfb_putpalreg(struct platinumfb_softc *,
 				     uint8_t, uint8_t, uint8_t, uint8_t);
 static uint32_t platinumfb_line_tweak(struct platinumfb_softc *);
 static paddr_t	platinumfb_page_align_up(struct platinumfb_softc *);
 static void 	platinumfb_set_clock(struct platinumfb_softc *);
 static void	platinumfb_dac_type(struct platinumfb_softc *);
 static void	platinumfb_memory_size(struct platinumfb_softc *);
 static void	platinumfb_set_hardware(struct platinumfb_softc *);
 
 static inline void platinumfb_write_reg(struct platinumfb_softc *,
 					int, uint32_t);
 static inline uint32_t platinumfb_read_reg(struct platinumfb_softc *, int);
 static inline void platinumfb_write_cmap_reg(struct platinumfb_softc *, 
 					     int, uint8_t);
 static inline uint8_t platinumfb_read_cmap_reg(struct platinumfb_softc *, int);
 static inline void platinumfb_store_d2(struct platinumfb_softc *, 
 				       uint8_t, uint8_t);
 
 struct wsscreen_descr platinumfb_defaultscreen = {
 	"default",
 	0, 0,
 	NULL,
 	8, 16,
 	WSSCREEN_WSCOLORS | WSSCREEN_HILIT,
 	NULL,
 };
 
 const struct wsscreen_descr *_platinumfb_scrlist[] = {
 	&platinumfb_defaultscreen,
 	/* XXX other formats, graphics screen? */
 };
 
 struct wsscreen_list platinumfb_screenlist = {
 	sizeof(_platinumfb_scrlist) / sizeof(struct wsscreen_descr *),
 	_platinumfb_scrlist
 };
 
 struct wsdisplay_accessops platinumfb_accessops = {
 	platinumfb_ioctl,
 	platinumfb_mmap,
 	NULL,
 	NULL,
 	NULL,
 	NULL,	/* load_font */
 	NULL,	/* polls */
 	NULL,	/* scroll */
 };
 
 static inline void
 platinumfb_write_reg(struct platinumfb_softc *sc, int reg, uint32_t val)
 {
     out32(sc->sc_reg + PLATINUM_REG_OFFSET_ADDR(reg), val);
 }
 
 static inline uint32_t
 platinumfb_read_reg(struct platinumfb_softc *sc, int reg)
 {
     return in32(sc->sc_reg + PLATINUM_REG_OFFSET_ADDR(reg));
 }
 
 static inline void
 platinumfb_write_cmap_reg(struct platinumfb_softc *sc, 
 			  int reg_offset, uint8_t val)
 {
     out8(sc->sc_cmap + reg_offset, val);
 }
 
 static inline uint8_t
 platinumfb_read_cmap_reg(struct platinumfb_softc *sc, int reg_offset)
 {
     return in8(sc->sc_cmap + reg_offset);
 }
 
 static inline void
 platinumfb_store_d2(struct platinumfb_softc *sc, 
 			  uint8_t a, uint8_t d)
 {
     platinumfb_write_cmap_reg(sc, PLATINUM_CMAP_ADDR_OFFSET, a + 32);
     platinumfb_write_cmap_reg(sc, PLATINUM_CMAP_D2_OFFSET, d);
 }
 
 static void
 platinumfb_putpalreg(struct platinumfb_softc *sc,
     uint8_t reg, uint8_t r, uint8_t g, uint8_t b)
 {
     platinumfb_write_cmap_reg(sc, PLATINUM_CMAP_ADDR_OFFSET, reg);
     platinumfb_write_cmap_reg(sc, PLATINUM_CMAP_LUT_OFFSET, r);
     platinumfb_write_cmap_reg(sc, PLATINUM_CMAP_LUT_OFFSET, g);
     platinumfb_write_cmap_reg(sc, PLATINUM_CMAP_LUT_OFFSET, b);
 }
 
 static uint32_t
 platinumfb_line_tweak(struct platinumfb_softc *sc)
 {
     /* bytes per line adjustment depending on resolution and depth */
     if (sc->sc_cmode > PLATINUM_CMODE_8 &&
 	strcmp(sc->sc_pfs->vmode_name, "832x624x75") == 0)
 	return 0x10;
     else
 	return 0x20;
 }
 
 static paddr_t
 platinumfb_page_align_up(struct platinumfb_softc *sc)
 {
     /* round up framebuffer address to the next highest page */
     paddr_t addr = (paddr_t)sc->sc_fb;
     paddr_t ret = round_page(addr);
 
     if (ret == addr)
 	ret = round_page(addr + 1);
 
     return ret;
 }
 
 /* 2 versions of platinum clock, older one uses clock[1] and
  *     freq = 14.3Mhz * c0 / (c1 & 0x1f) / (1 << (c1 >> 5))
  * newer one uses clock[0] and
  *     freq = 15Mhz * c0 / ((c1 & 0x1f) + 2) / (1 << (c1 >> 5))
  */
 static void
 platinumfb_set_clock(struct platinumfb_softc *sc)
 {
     uint8_t clk_idx = sc->sc_dac_type == PLATINUM_DAC_1 ? 1 : 0;
     uint8_t d2;
  
     platinumfb_store_d2(sc, 6, 0xc6);
  
     platinumfb_write_cmap_reg(sc, PLATINUM_CMAP_ADDR_OFFSET, 3+32);
     d2 = platinumfb_read_cmap_reg(sc, PLATINUM_CMAP_D2_OFFSET);
 
     if (d2 == 2) {
 	platinumfb_store_d2(sc, 7, sc->sc_pfs->clock_params[clk_idx][0]);
 	platinumfb_store_d2(sc, 8, sc->sc_pfs->clock_params[clk_idx][1]);
 	platinumfb_store_d2(sc, 3, 3);
     } else {
 	platinumfb_store_d2(sc, 4, sc->sc_pfs->clock_params[clk_idx][0]);
 	platinumfb_store_d2(sc, 5, sc->sc_pfs->clock_params[clk_idx][1]);
 	platinumfb_store_d2(sc, 3, 2);
     }
 
     delay(5000);
     platinumfb_store_d2(sc, 9, 0xa6);
 }
 
 static void
 platinumfb_dac_type(struct platinumfb_softc *sc)
 {
     uint8_t dtype = 0;
     
     platinumfb_write_cmap_reg(sc, PLATINUM_CMAP_ADDR_OFFSET, 0x40);
     dtype = platinumfb_read_cmap_reg(sc, PLATINUM_CMAP_D2_OFFSET);
 
     switch (dtype) {
     case PLATINUM_DAC_0:
     case PLATINUM_DAC_1:
 	/* do nothing */
 	break;
     default:
 	aprint_error_dev(sc->sc_dev, "unknown dac 0x%x, using 0x%x\n",
 			 dtype, PLATINUM_DAC_0);
 	dtype = PLATINUM_DAC_0;
 	break;
     }
 
     /* save type */
     sc->sc_dac_type = dtype;
 }
 
 static void
 platinumfb_memory_size(struct platinumfb_softc *sc)
 {
     int i;
     off_t offset = PLATINUM_FB_BANK_SIZE;
     paddr_t total_vram = PLATINUM_FB_MIN_SIZE;
 
     uint8_t test_val[] = {0x34, 0x56, 0x78};
     uint8_t bank[] = {0, 0, 0};
     uint8_t num_elems = sizeof(test_val)/sizeof(test_val[0]);
 
     volatile uint8_t *fbuffer = mapiodev((paddr_t)sc->sc_fb, sc->sc_fb_size, false);
 
     if (fbuffer == NULL)
 	panic("platinumfb could not mapiodev");
 
     /* turn on all banks of RAM */
     platinumfb_write_reg(sc, 16, (paddr_t)sc->sc_fb);
     platinumfb_write_reg(sc, 20, 0x1011);
     platinumfb_write_reg(sc, 24, 0);
 
     /*
      * write "unique" value to each bank of memory and read value
      * back. if match assumes VRAM bank exists.  On the powermac 7200,
      * bank0 is always there and soldered to motherboard, don't know
      * if that is the case for others
      */
     for (i = 0 ; i < num_elems; i++) {
 	out8(fbuffer + offset, test_val[i]);
 	out8(fbuffer + offset + 0x8, 0x0);
 
 	__asm volatile ("eieio; dcbf 0,%0"::"r"(&fbuffer[offset]):"memory");
 
 	bank[i] = fbuffer[offset] == test_val[i];
 	total_vram += bank[i] * PLATINUM_FB_BANK_SIZE;
 	offset += PLATINUM_FB_BANK_SIZE;
     }
 
     /* save total vram or minimum */
     if (total_vram >= PLATINUM_FB_MIN_SIZE && total_vram <= PLATINUM_FB_MAX_SIZE) {
 	sc->sc_vram = total_vram;
     } else {
 	aprint_error_dev(sc->sc_dev,
 			 "invalid VRAM size 0x%lx, using min 0x%x\n",
 			 total_vram, PLATINUM_FB_MIN_SIZE);
 	sc->sc_vram = PLATINUM_FB_MIN_SIZE;
     }
 
     unmapiodev((paddr_t)fbuffer, sc->sc_fb_size);
 }
 
 static int
 platinumfb_match(device_t parent, cfdata_t cf, void *aux)
 {
 	struct confargs *ca = aux;
 
 	return (strcmp(ca->ca_name, "platinum") == 0);
 }
 
 static void
 platinumfb_attach(device_t parent, device_t self, void *aux)
 {
 	struct platinumfb_softc *sc = device_private(self);
 	struct confargs *ca = aux;
 	u_int *reg = ca->ca_reg;
 
 	sc->sc_dev = self;
 	sc->sc_node = ca->ca_node;
 
 	sc->sc_reg = (uint8_t *)reg[0];
 	sc->sc_reg_size = reg[1];
 
 	sc->sc_fb = (uint8_t *)reg[2];
 	sc->sc_fb_size = PLATINUM_FB_MAX_SIZE;
 
 	sc->sc_cmap = (uint8_t *)PLATINUM_CMAP_BASE_ADDR;
 	sc->sc_cmap_size = PLATINUM_CMAP_SIZE;
 
 	aprint_normal(" reg-addr 0x%08lx fb-addr 0x%08lx cmap-addr 0x%08lx\n",
 		      (paddr_t)sc->sc_reg, 
 		      (paddr_t)sc->sc_fb,
 		      (paddr_t)sc->sc_cmap);
 
 	config_finalize_register(sc->sc_dev, platinumfb_init);
 }
 
 static void
 platinumfb_init_cmap(struct platinumfb_softc *sc)
 {
     int i;
     uint8_t tmp;
 
     switch (sc->sc_cmode) {
     case PLATINUM_CMODE_8:
     default:
 	/* R3G3B2 colormap */
 	for (i = 0; i < 256; i++) {
 	    tmp = i & 0xe0;
 	    /*
 	     * replicate bits so 0xe0 maps to a red value of 0xff
 	     * in order to make white look actually white
 	     */
 	    tmp |= (tmp >> 3) | (tmp >> 6);
 	    sc->sc_cmap_red[i] = tmp;
 
 	    tmp = (i & 0x1c) << 3;
 	    tmp |= (tmp >> 3) | (tmp >> 6);
 	    sc->sc_cmap_green[i] = tmp;
 
 	    tmp = (i & 0x03) << 6;
 	    tmp |= tmp >> 2;
 	    tmp |= tmp >> 4;
 	    sc->sc_cmap_blue[i] = tmp;
 	}
 	break;
 
     case PLATINUM_CMODE_16:
 	for (i = 0; i < 32; i++) {
 	    tmp = 255 * i / 32;
 	    sc->sc_cmap_red[i] = tmp;
 	    sc->sc_cmap_green[i] = tmp;
 	    sc->sc_cmap_blue[i] = tmp;
 	}
 	for (i = 32; i < 256; i++) {
 	    sc->sc_cmap_red[i] =  0;
 	    sc->sc_cmap_blue[i] = 0;
 	    sc->sc_cmap_green[i] = 0;
 	}
 	break;
 
     case PLATINUM_CMODE_32:
 	for (i = 0; i < 256; i++) {
 	    sc->sc_cmap_red[i] = i;
 	    sc->sc_cmap_green[i] = i;
 	    sc->sc_cmap_blue[i] = i;
 	}
 	break;
     }
 }
 
 static void
 platinumfb_restore_palette(struct platinumfb_softc *sc)
 {
     int i;
     for (i = 0; i < 256; i++) {
 	platinumfb_putpalreg(sc, i, sc->sc_cmap_red[i],
 			     sc->sc_cmap_green[i], sc->sc_cmap_blue[i]);
     }
 }
 
 static int
 platinumfb_init(device_t self)
 {
 	struct platinumfb_softc *sc = device_private(self);
 	const struct videomode *mode = NULL;
 	struct rasops_info *ri;
 
 	struct wsemuldisplaydev_attach_args aa;
 	bool is_console = FALSE;
 	long defattr;
 
 	int i;
 
 	/*
 	 * become console if OF variable "output-device" is "screen" or
 	 * contains "platinum", since normal OF video variables are unavailable
 	 */
 	int options;
 	char output_device[128];
 	options = OF_finddevice("/options");
 	if (options == 0 || 
 	    options == -1 ||
 	    OF_getprop(options, "output-device", output_device, sizeof(output_device)) == 0 ) {
 	    aprint_error_dev(sc->sc_dev, "could not get output-device prop, assuming not console\n");
 	}
 	else {
 	    if (strstr(output_device,"platinum") ||
 		strcmp(output_device,"screen") == 0 ) {
 		is_console = TRUE;
 	    }
 	}	
 
 	sc->sc_pfs = NULL;
 	sc->sc_mode = WSDISPLAYIO_MODE_EMUL;
 	sc->sc_on = WSDISPLAYIO_VIDEO_ON;
 
 	/* determine vram memory and dac clock type */
 	platinumfb_memory_size(sc);
 	platinumfb_dac_type(sc);
 
 	aprint_normal_dev(sc->sc_dev,"is_console %d dac 0x%x vram 0x%x\n",
 			  is_console, sc->sc_dac_type, sc->sc_vram);
 
 	for (i=0; i < sizeof(pfb_setting)/sizeof(pfb_setting[0]); i++)
 	{
 	    if (strcmp(PLATINUM_FB_VMODE, pfb_setting[i]->vmode_name)==0) {
 		mode = pick_mode_by_ref(pfb_setting[i]->width, 
 					pfb_setting[i]->height,
 					pfb_setting[i]->freq);
 		break;
 	    }
 	}
 
 	if (!mode) {
 	    aprint_error_dev(sc->sc_dev, "pick_mode_by_ref failed, using default\n");
 	    mode = pick_mode_by_ref(800, 600, 75);
 	}
 
 	if (platinumfb_set_mode(sc, mode, PLATINUM_CONSOLE_DEPTH) != 0) {
 	    aprint_error_dev(sc->sc_dev, "platinumfb_set_mode failed\n");
 	    return 0;
 	}
 
 	vcons_init(&sc->vd, sc, &platinumfb_defaultscreen,
 		   &platinumfb_accessops);
 	sc->vd.init_screen = platinumfb_init_screen;
 
 	ri = &platinumfb_console_screen.scr_ri;
 	vcons_init_screen(&sc->vd, &platinumfb_console_screen, 1, &defattr);
 
 	platinumfb_console_screen.scr_flags |= VCONS_SCREEN_IS_STATIC;
 
 	platinumfb_defaultscreen.textops = &ri->ri_ops;
 	platinumfb_defaultscreen.capabilities = ri->ri_caps;
 	platinumfb_defaultscreen.nrows = ri->ri_rows;
 	platinumfb_defaultscreen.ncols = ri->ri_cols;
 
 	if (is_console) {
 		wsdisplay_cnattach(&platinumfb_defaultscreen, ri, 0, 0,
 		    defattr);
 		vcons_replay_msgbuf(&platinumfb_console_screen);
 	}
 
 	aa.console = is_console;
 	aa.scrdata = &platinumfb_screenlist;
 	aa.accessops = &platinumfb_accessops;
 	aa.accesscookie = &sc->vd;
 
 	config_found(self, &aa, wsemuldisplaydevprint);
 
 	return 0;
 }
 
 static void
 platinumfb_set_hardware(struct platinumfb_softc *sc)
 {
     int i;
     bool one_bank = sc->sc_vram == PLATINUM_FB_BANK_SIZE;
 
     /* now start programming the chip */
     platinumfb_write_reg(sc, 24, 7);    /* turn off display */
 
     for (i = 0; i < 26; ++i)
 	platinumfb_write_reg(sc, i+32, sc->sc_pfs->regs[i]);
 
     platinumfb_write_reg(sc, 26+32, one_bank ? 
 			 sc->sc_pfs->offset[sc->sc_cmode] + 4 - sc->sc_cmode :
 			 sc->sc_pfs->offset[sc->sc_cmode]);
 
     /*
      * reg 16 apparently needs an address 0x10 less the where frame
      * buffer/ri_bits start for console text to be aligned.  In
      * addition, X memory maps (mmap) the frame buffer starting on
      * page boundaries.  So to get both X and console text aligned we
      * start at the first page up from sc_fb[0]. Starting at sc_fb[0]
      * did work on my machine but not sure if this negative offset
      * would be problematic elsewhere.
      *
      * Not sure why linux used different fb offsets for each mode, as
      * any addresses seemed to work as long as relative difference was
      * 0x10.
      */
     platinumfb_write_reg(sc, 16, platinumfb_page_align_up(sc) - 0x10);
 
     platinumfb_write_reg(sc, 18, sc->sc_pfs->pitch[sc->sc_cmode]);
 
     /* 
      * XXX register 19 setting looks wrong for 1 bank & 32 bpp.
      * 512x384 is only resolution that would use such a setting, but
      * that is not currently in videomodes.c
      */
     if (sc->sc_cmode == PLATINUM_CMODE_32 &&
 	(sc->sc_pfs->macmode == 1 || sc->sc_pfs->macmode == 2))
 	aprint_error_dev(sc->sc_dev, "platinumfb reg19 array out-of-bounds");
 
     platinumfb_write_reg(sc, 19, one_bank ? 
 			 sc->sc_pfs->mode[sc->sc_cmode+1] : /* XXX fix this for 32 bpp */
 			 sc->sc_pfs->mode[sc->sc_cmode]);
 
     platinumfb_write_reg(sc, 20, one_bank ? 0x11 : 0x1011);
     platinumfb_write_reg(sc, 21, 0x100);
     platinumfb_write_reg(sc, 22, 1);
     platinumfb_write_reg(sc, 23, 1);
     platinumfb_write_reg(sc, 26, 0xc00);
     platinumfb_write_reg(sc, 27, 0x235);
     /* platinumfb_write_reg(sc, 27, 0x2aa); */
 
     platinumfb_store_d2(sc, 0, one_bank ? sc->sc_pfs->dacula_ctrl[sc->sc_cmode] & 0xf :
                                           sc->sc_pfs->dacula_ctrl[sc->sc_cmode]);
     platinumfb_store_d2(sc, 1, 4);
     platinumfb_store_d2(sc, 2, 0);
 
     platinumfb_set_clock(sc);
 
     platinumfb_write_reg(sc, 24, 0);  /* turn display on */
 }
 
 static int
 platinumfb_set_mode(struct platinumfb_softc *sc,
     const struct videomode *mode, int depth)
 {
 	int i;
 	
 	/* first find the parameter for the mode register */
 	i = 0;
 	while((i < __arraycount(pfb_setting)) &&
 	      (strcmp(mode->name, pfb_setting[i]->vmode_name) != 0))
 	    i++;
 
 	if (i >= __arraycount(pfb_setting)) {
 		aprint_error_dev(sc->sc_dev,
 		    "Can't find a mode register value for %s\n", 
 				 mode->name);
 		return EINVAL;
 	}
 
 	/* found a mode */
 	sc->sc_pfs = pfb_setting[i];
 
 	/* determine depth settings */
 	switch (depth) {
 	case 8:
 	default:
 	    sc->sc_depth = 8;
 	    sc->sc_cmode = PLATINUM_CMODE_8;
 	    break;
 	case 15:
 	case 16:
 	    /* 15 bpp but use 16 so X/wsfb works */
 	    sc->sc_depth = 16;
 	    sc->sc_cmode = PLATINUM_CMODE_16;
 	    break;
 	case 24:
 	case 32:
 	    /* 24 bpp but use 32 so X/wsfb works */
 	    sc->sc_depth = 32;
 	    sc->sc_cmode = PLATINUM_CMODE_32;
 	    break;
 	}
 
 	sc->sc_modereg = sc->sc_pfs->macmode;
 	sc->sc_videomode = mode;
 	sc->sc_height = mode->vdisplay;
 	sc->sc_width = mode->hdisplay;
 	sc->sc_linebytes = sc->sc_width * (1 << sc->sc_cmode) + platinumfb_line_tweak(sc);
 
 	/* check if we have enough video memory */
 	if (sc->sc_height * sc->sc_linebytes > sc->sc_vram - PAGE_SIZE) {
 	    aprint_error_dev(sc->sc_dev, "Not enough video RAM for %s\n",
 			     mode->name);
 	    return EINVAL;
 	}
 
 	/* set up and write colormap */
 	platinumfb_init_cmap(sc);
 	platinumfb_restore_palette(sc);
 
 	/* set hardware registers */
 	platinumfb_set_hardware(sc);
 
 	aprint_normal_dev(sc->sc_dev, "switched to %s in %d bit color\n",
 			  sc->sc_pfs->vmode_name, sc->sc_depth);
 	return 0;
 }
 
 static int
 platinumfb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag,
 	struct lwp *l)
 {
         struct vcons_data *vd = v;
         struct platinumfb_softc *sc = vd->cookie;
         struct wsdisplay_fbinfo *wdf;
         struct vcons_screen *ms = vd->active;
 	int i;
 
         switch (cmd) {
         case WSDISPLAYIO_GTYPE:
                 *(u_int *)data = WSDISPLAY_TYPE_PLATINUM;
                 return 0;
 
         case WSDISPLAYIO_GINFO:
                 wdf = (void *)data;
                 wdf->height = ms->scr_ri.ri_height;
                 wdf->width = ms->scr_ri.ri_width;
                 wdf->depth = ms->scr_ri.ri_depth;
                 wdf->cmsize = 256;
                 return 0;
 
         case WSDISPLAYIO_GVIDEO:
                 *(int *)data = sc->sc_on;
                 return 0;
 
         case WSDISPLAYIO_SVIDEO:
 		/* 
 		 * poor man's screen blanking, just write zeros to colormap
 		 * registers but don't save in softc.  
 		 */
                 if (*(int *)data != sc->sc_on) {
                     sc->sc_on = (sc->sc_on == WSDISPLAYIO_VIDEO_ON ?
 				 WSDISPLAYIO_VIDEO_OFF : WSDISPLAYIO_VIDEO_ON);
 
 		    /* XXX need to lock colormap? */
                     if (sc->sc_on == WSDISPLAYIO_VIDEO_OFF)
                         for (i=0; i < 256; i++)
                             platinumfb_putpalreg(sc, i, 0, 0, 0);
                     else
 			platinumfb_restore_palette(sc);
                 }
                 return 0;
                
         case WSDISPLAYIO_GETCMAP:
 	        if (sc->sc_cmode == PLATINUM_CMODE_8)
 		    return platinumfb_getcmap(sc, (struct wsdisplay_cmap *)data);
 		else
 		    return 0;
 
         case WSDISPLAYIO_PUTCMAP:
 	        if (sc->sc_cmode == PLATINUM_CMODE_8)
 		    return platinumfb_putcmap(sc, (struct wsdisplay_cmap *)data);
 		else
 		    return 0;
 
         case WSDISPLAYIO_SMODE: {
 	  int new_mode = *(int*)data;
 
 	  if (new_mode != sc->sc_mode) {
 
 	    int new_depth = new_mode == WSDISPLAYIO_MODE_EMUL ?
 	      PLATINUM_CONSOLE_DEPTH : PLATINUM_FB_DEPTH;
 
 	    switch(new_mode) {
 	      /*
 	       * XXX - not sure how this is supposed to work for
 	       * switching bpp between console and X, but cases with
 	       * (EMUL MAPPED) or (EMUL MAPPED DUMBFB) work, but 
 	       * (EMUL DUMBFB) garbles screen for some reason.
 	       */
 	    case WSDISPLAYIO_MODE_EMUL:
 	    case WSDISPLAYIO_MODE_MAPPED:
 	    /* case WSDISPLAYIO_MODE_DUMBFB: XXX */
 
 	      /* in case screen is "blanked" */
 	      platinumfb_restore_palette(sc);
 	      
 	      sc->sc_mode = new_mode;
 
 	      platinumfb_set_mode(sc, sc->sc_videomode, new_depth);
 	      platinumfb_set_rasops(sc, &ms->scr_ri, true);
 	    
 	      if (new_mode == WSDISPLAYIO_MODE_EMUL)
 		vcons_redraw_screen(ms);
 	    }
 	  }
 	  
 	  return 0;
 	}
 
 	case WSDISPLAYIO_LINEBYTES:
 	        *(u_int *)data = sc->sc_linebytes;
 		return 0;
 
 	case WSDISPLAYIO_GET_FBINFO: {
 	    struct wsdisplayio_fbinfo *fbi = data;
 	    return wsdisplayio_get_fbinfo(&ms->scr_ri, fbi);
 	}
 
 	}
 	return EPASSTHROUGH;
 }
 
 static paddr_t
 platinumfb_mmap(void *v, void *vs, off_t offset, int prot)
 {
 	struct vcons_data *vd = v;
 	struct platinumfb_softc *sc = vd->cookie;
 	paddr_t pa = -1;
 	paddr_t fb_aligned = platinumfb_page_align_up(sc);
 	paddr_t fb_vram = sc->sc_vram - (fb_aligned - (paddr_t)sc->sc_fb);
 
 	/* XXX need to worry about superuser or mapping other registers? */
 
 	if (offset >= 0 && offset < fb_vram)
 	    pa = fb_aligned + offset;
 
 	return pa;
 }
 
 static void platinumfb_set_rasops(struct platinumfb_softc *sc,
 				  struct rasops_info *ri,
 				  int existing)
 {
 	memset(ri, 0, sizeof(struct rasops_info));
 
 	ri->ri_depth = sc->sc_depth;
 	ri->ri_width = sc->sc_width;
 	ri->ri_height = sc->sc_height;
 	ri->ri_stride = sc->sc_linebytes;
 	ri->ri_bits = (u_char*)platinumfb_page_align_up(sc);
 	ri->ri_flg = RI_FULLCLEAR;
 
 	if (existing)
 	    ri->ri_flg |= RI_CLEAR;
 
 	switch (sc->sc_cmode) {
 	case PLATINUM_CMODE_8:
 	default:
 	    ri->ri_flg |= RI_ENABLE_ALPHA | RI_8BIT_IS_RGB;
 
 	    break;
 	case PLATINUM_CMODE_16:
 	    if ( strcmp(sc->sc_pfs->vmode_name, "640x480x60") == 0 ||
 		 strcmp(sc->sc_pfs->vmode_name, "800x600x75") == 0 )
 		ri->ri_flg |= RI_ENABLE_ALPHA;
 
 	    ri->ri_rnum = 5;
 	    ri->ri_rpos = 10;
 	    ri->ri_gnum = 5;
 	    ri->ri_gpos = 5;
 	    ri->ri_bnum = 5;
 	    ri->ri_bpos = 0;
 
 	    break;
 	case PLATINUM_CMODE_32:
 	    if ( strcmp(sc->sc_pfs->vmode_name, "640x480x60") == 0 ||
 		 strcmp(sc->sc_pfs->vmode_name, "800x600x75") == 0 )
 		ri->ri_flg |= RI_ENABLE_ALPHA;
 
 	    ri->ri_rnum = 8;
 	    ri->ri_rpos = 16;
 	    ri->ri_gnum = 8;
 	    ri->ri_gpos = 8;
 	    ri->ri_bnum = 8;
 	    ri->ri_bpos = 0;
 
 	    break;
 	}
 
 	rasops_init(ri, 0, 0);
 	ri->ri_caps = WSSCREEN_WSCOLORS;
 
 	rasops_reconfig(ri, sc->sc_height / ri->ri_font->fontheight,
 		    sc->sc_width / ri->ri_font->fontwidth);
 
 }
 
 static void
 platinumfb_init_screen(void *cookie, struct vcons_screen *scr,
     int existing, long *defattr)
 {
 	struct platinumfb_softc *sc = cookie;
 	struct rasops_info *ri = &scr->scr_ri;
 
 	scr->scr_flags |= VCONS_DONT_READ;
 	
 	platinumfb_set_rasops(sc, ri, existing);
 	
 	ri->ri_hw = scr;
 }
 
 static int
 platinumfb_putcmap(struct platinumfb_softc *sc, struct wsdisplay_cmap *cm)
 {
 	u_char *r, *g, *b;
 	u_int index = cm->index;
 	u_int count = cm->count;
 	int i, error;
 	u_char rbuf[256], gbuf[256], bbuf[256];
 
 	if (cm->index >= 256 || cm->count > 256 ||
 	    (cm->index + cm->count) > 256)
 		return EINVAL;
 	error = copyin(cm->red, &rbuf[index], count);
 	if (error)
 		return error;
 	error = copyin(cm->green, &gbuf[index], count);
 	if (error)
 		return error;
 	error = copyin(cm->blue, &bbuf[index], count);
 	if (error)
 		return error;
 
 	memcpy(&sc->sc_cmap_red[index], &rbuf[index], count);
 	memcpy(&sc->sc_cmap_green[index], &gbuf[index], count);
 	memcpy(&sc->sc_cmap_blue[index], &bbuf[index], count);
 
 	/* write colormap registers if not currently blanked */
 	if (sc->sc_on == WSDISPLAYIO_VIDEO_ON) {
 	    r = &sc->sc_cmap_red[index];
 	    g = &sc->sc_cmap_green[index];
 	    b = &sc->sc_cmap_blue[index];
 
 	    for (i = 0; i < count; i++) {
 		platinumfb_putpalreg(sc, index, *r, *g, *b);
 		index++;
 		r++, g++, b++;
 	    }
 	}
 
 	return 0;
 }
 
 static int
 platinumfb_getcmap(struct platinumfb_softc *sc, struct wsdisplay_cmap *cm)
 {
 	u_int index = cm->index;
 	u_int count = cm->count;
 	int error;
 
 	if (index >= 255 || count > 256 || index + count > 256)
 		return EINVAL;
 
 	error = copyout(&sc->sc_cmap_red[index],   cm->red,   count);
 	if (error)
 		return error;
 	error = copyout(&sc->sc_cmap_green[index], cm->green, count);
 	if (error)
 		return error;
 	error = copyout(&sc->sc_cmap_blue[index],  cm->blue,  count);
 	if (error)
 		return error;
 
 	return 0;
 }
 


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