/drivers/staging/sm750fb/sm750_hw.c
C | 568 lines | 434 code | 77 blank | 57 comment | 60 complexity | 53a659d7c10ace1015894941a0a8e433 MD5 | raw file
- // SPDX-License-Identifier: GPL-2.0
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/errno.h>
- #include <linux/string.h>
- #include <linux/mm.h>
- #include <linux/slab.h>
- #include <linux/delay.h>
- #include <linux/fb.h>
- #include <linux/ioport.h>
- #include <linux/init.h>
- #include <linux/pci.h>
- #include <linux/vmalloc.h>
- #include <linux/pagemap.h>
- #include <linux/console.h>
- #ifdef CONFIG_MTRR
- #include <asm/mtrr.h>
- #endif
- #include <linux/platform_device.h>
- #include <linux/screen_info.h>
- #include <linux/sizes.h>
- #include "sm750.h"
- #include "ddk750.h"
- #include "sm750_accel.h"
- void __iomem *mmio750;
- int hw_sm750_map(struct sm750_dev *sm750_dev, struct pci_dev *pdev)
- {
- int ret;
- ret = 0;
- sm750_dev->vidreg_start = pci_resource_start(pdev, 1);
- sm750_dev->vidreg_size = SZ_2M;
- pr_info("mmio phyAddr = %lx\n", sm750_dev->vidreg_start);
- /*
- * reserve the vidreg space of smi adaptor
- * if you do this, you need to add release region code
- * in lynxfb_remove, or memory will not be mapped again
- * successfully
- */
- ret = pci_request_region(pdev, 1, "sm750fb");
- if (ret) {
- pr_err("Can not request PCI regions.\n");
- goto exit;
- }
- /* now map mmio and vidmem */
- sm750_dev->pvReg = ioremap_nocache(sm750_dev->vidreg_start,
- sm750_dev->vidreg_size);
- if (!sm750_dev->pvReg) {
- pr_err("mmio failed\n");
- ret = -EFAULT;
- goto exit;
- } else {
- pr_info("mmio virtual addr = %p\n", sm750_dev->pvReg);
- }
- sm750_dev->accel.dprBase = sm750_dev->pvReg + DE_BASE_ADDR_TYPE1;
- sm750_dev->accel.dpPortBase = sm750_dev->pvReg + DE_PORT_ADDR_TYPE1;
- mmio750 = sm750_dev->pvReg;
- sm750_set_chip_type(sm750_dev->devid, sm750_dev->revid);
- sm750_dev->vidmem_start = pci_resource_start(pdev, 0);
- /*
- * don't use pdev_resource[x].end - resource[x].start to
- * calculate the resource size, it's only the maximum available
- * size but not the actual size, using
- * @ddk750_get_vm_size function can be safe.
- */
- sm750_dev->vidmem_size = ddk750_get_vm_size();
- pr_info("video memory phyAddr = %lx, size = %u bytes\n",
- sm750_dev->vidmem_start, sm750_dev->vidmem_size);
- /* reserve the vidmem space of smi adaptor */
- sm750_dev->pvMem = ioremap_wc(sm750_dev->vidmem_start,
- sm750_dev->vidmem_size);
- if (!sm750_dev->pvMem) {
- pr_err("Map video memory failed\n");
- ret = -EFAULT;
- goto exit;
- } else {
- pr_info("video memory vaddr = %p\n", sm750_dev->pvMem);
- }
- exit:
- return ret;
- }
- int hw_sm750_inithw(struct sm750_dev *sm750_dev, struct pci_dev *pdev)
- {
- struct init_status *parm;
- parm = &sm750_dev->initParm;
- if (parm->chip_clk == 0)
- parm->chip_clk = (sm750_get_chip_type() == SM750LE) ?
- DEFAULT_SM750LE_CHIP_CLOCK :
- DEFAULT_SM750_CHIP_CLOCK;
- if (parm->mem_clk == 0)
- parm->mem_clk = parm->chip_clk;
- if (parm->master_clk == 0)
- parm->master_clk = parm->chip_clk / 3;
- ddk750_init_hw((struct initchip_param *)&sm750_dev->initParm);
- /* for sm718, open pci burst */
- if (sm750_dev->devid == 0x718) {
- poke32(SYSTEM_CTRL,
- peek32(SYSTEM_CTRL) | SYSTEM_CTRL_PCI_BURST);
- }
- if (sm750_get_chip_type() != SM750LE) {
- unsigned int val;
- /* does user need CRT? */
- if (sm750_dev->nocrt) {
- poke32(MISC_CTRL,
- peek32(MISC_CTRL) | MISC_CTRL_DAC_POWER_OFF);
- /* shut off dpms */
- val = peek32(SYSTEM_CTRL) & ~SYSTEM_CTRL_DPMS_MASK;
- val |= SYSTEM_CTRL_DPMS_VPHN;
- poke32(SYSTEM_CTRL, val);
- } else {
- poke32(MISC_CTRL,
- peek32(MISC_CTRL) & ~MISC_CTRL_DAC_POWER_OFF);
- /* turn on dpms */
- val = peek32(SYSTEM_CTRL) & ~SYSTEM_CTRL_DPMS_MASK;
- val |= SYSTEM_CTRL_DPMS_VPHP;
- poke32(SYSTEM_CTRL, val);
- }
- val = peek32(PANEL_DISPLAY_CTRL) &
- ~(PANEL_DISPLAY_CTRL_DUAL_DISPLAY |
- PANEL_DISPLAY_CTRL_DOUBLE_PIXEL);
- switch (sm750_dev->pnltype) {
- case sm750_24TFT:
- break;
- case sm750_doubleTFT:
- val |= PANEL_DISPLAY_CTRL_DOUBLE_PIXEL;
- break;
- case sm750_dualTFT:
- val |= PANEL_DISPLAY_CTRL_DUAL_DISPLAY;
- break;
- }
- poke32(PANEL_DISPLAY_CTRL, val);
- } else {
- /*
- * for 750LE, no DVI chip initialization
- * makes Monitor no signal
- *
- * Set up GPIO for software I2C to program DVI chip in the
- * Xilinx SP605 board, in order to have video signal.
- */
- sm750_sw_i2c_init(0, 1);
- /*
- * Customer may NOT use CH7301 DVI chip, which has to be
- * initialized differently.
- */
- if (sm750_sw_i2c_read_reg(0xec, 0x4a) == 0x95) {
- /*
- * The following register values for CH7301 are from
- * Chrontel app note and our experiment.
- */
- pr_info("yes,CH7301 DVI chip found\n");
- sm750_sw_i2c_write_reg(0xec, 0x1d, 0x16);
- sm750_sw_i2c_write_reg(0xec, 0x21, 0x9);
- sm750_sw_i2c_write_reg(0xec, 0x49, 0xC0);
- pr_info("okay,CH7301 DVI chip setup done\n");
- }
- }
- /* init 2d engine */
- if (!sm750_dev->accel_off)
- hw_sm750_initAccel(sm750_dev);
- return 0;
- }
- int hw_sm750_output_setMode(struct lynxfb_output *output,
- struct fb_var_screeninfo *var,
- struct fb_fix_screeninfo *fix)
- {
- int ret;
- enum disp_output disp_set;
- int channel;
- ret = 0;
- disp_set = 0;
- channel = *output->channel;
- if (sm750_get_chip_type() != SM750LE) {
- if (channel == sm750_primary) {
- pr_info("primary channel\n");
- if (output->paths & sm750_panel)
- disp_set |= do_LCD1_PRI;
- if (output->paths & sm750_crt)
- disp_set |= do_CRT_PRI;
- } else {
- pr_info("secondary channel\n");
- if (output->paths & sm750_panel)
- disp_set |= do_LCD1_SEC;
- if (output->paths & sm750_crt)
- disp_set |= do_CRT_SEC;
- }
- ddk750_set_logical_disp_out(disp_set);
- } else {
- /* just open DISPLAY_CONTROL_750LE register bit 3:0 */
- u32 reg;
- reg = peek32(DISPLAY_CONTROL_750LE);
- reg |= 0xf;
- poke32(DISPLAY_CONTROL_750LE, reg);
- }
- pr_info("ddk setlogicdispout done\n");
- return ret;
- }
- int hw_sm750_crtc_checkMode(struct lynxfb_crtc *crtc,
- struct fb_var_screeninfo *var)
- {
- struct sm750_dev *sm750_dev;
- struct lynxfb_par *par = container_of(crtc, struct lynxfb_par, crtc);
- sm750_dev = par->dev;
- switch (var->bits_per_pixel) {
- case 8:
- case 16:
- break;
- case 32:
- if (sm750_dev->revid == SM750LE_REVISION_ID) {
- pr_debug("750le do not support 32bpp\n");
- return -EINVAL;
- }
- break;
- default:
- return -EINVAL;
- }
- return 0;
- }
- /* set the controller's mode for @crtc charged with @var and @fix parameters */
- int hw_sm750_crtc_setMode(struct lynxfb_crtc *crtc,
- struct fb_var_screeninfo *var,
- struct fb_fix_screeninfo *fix)
- {
- int ret, fmt;
- u32 reg;
- struct mode_parameter modparm;
- enum clock_type clock;
- struct sm750_dev *sm750_dev;
- struct lynxfb_par *par;
- ret = 0;
- par = container_of(crtc, struct lynxfb_par, crtc);
- sm750_dev = par->dev;
- if (!sm750_dev->accel_off) {
- /* set 2d engine pixel format according to mode bpp */
- switch (var->bits_per_pixel) {
- case 8:
- fmt = 0;
- break;
- case 16:
- fmt = 1;
- break;
- case 32:
- default:
- fmt = 2;
- break;
- }
- sm750_hw_set2dformat(&sm750_dev->accel, fmt);
- }
- /* set timing */
- modparm.pixel_clock = ps_to_hz(var->pixclock);
- modparm.vertical_sync_polarity = (var->sync & FB_SYNC_HOR_HIGH_ACT)
- ? POS : NEG;
- modparm.horizontal_sync_polarity = (var->sync & FB_SYNC_VERT_HIGH_ACT)
- ? POS : NEG;
- modparm.clock_phase_polarity = (var->sync & FB_SYNC_COMP_HIGH_ACT)
- ? POS : NEG;
- modparm.horizontal_display_end = var->xres;
- modparm.horizontal_sync_width = var->hsync_len;
- modparm.horizontal_sync_start = var->xres + var->right_margin;
- modparm.horizontal_total = var->xres + var->left_margin +
- var->right_margin + var->hsync_len;
- modparm.vertical_display_end = var->yres;
- modparm.vertical_sync_height = var->vsync_len;
- modparm.vertical_sync_start = var->yres + var->lower_margin;
- modparm.vertical_total = var->yres + var->upper_margin +
- var->lower_margin + var->vsync_len;
- /* choose pll */
- if (crtc->channel != sm750_secondary)
- clock = PRIMARY_PLL;
- else
- clock = SECONDARY_PLL;
- pr_debug("Request pixel clock = %lu\n", modparm.pixel_clock);
- ret = ddk750_setModeTiming(&modparm, clock);
- if (ret) {
- pr_err("Set mode timing failed\n");
- goto exit;
- }
- if (crtc->channel != sm750_secondary) {
- /* set pitch, offset, width, start address, etc... */
- poke32(PANEL_FB_ADDRESS,
- crtc->oScreen & PANEL_FB_ADDRESS_ADDRESS_MASK);
- reg = var->xres * (var->bits_per_pixel >> 3);
- /*
- * crtc->channel is not equal to par->index on numeric,
- * be aware of that
- */
- reg = ALIGN(reg, crtc->line_pad);
- reg = (reg << PANEL_FB_WIDTH_WIDTH_SHIFT) &
- PANEL_FB_WIDTH_WIDTH_MASK;
- reg |= (fix->line_length & PANEL_FB_WIDTH_OFFSET_MASK);
- poke32(PANEL_FB_WIDTH, reg);
- reg = ((var->xres - 1) << PANEL_WINDOW_WIDTH_WIDTH_SHIFT) &
- PANEL_WINDOW_WIDTH_WIDTH_MASK;
- reg |= (var->xoffset & PANEL_WINDOW_WIDTH_X_MASK);
- poke32(PANEL_WINDOW_WIDTH, reg);
- reg = (var->yres_virtual - 1) <<
- PANEL_WINDOW_HEIGHT_HEIGHT_SHIFT;
- reg &= PANEL_WINDOW_HEIGHT_HEIGHT_MASK;
- reg |= (var->yoffset & PANEL_WINDOW_HEIGHT_Y_MASK);
- poke32(PANEL_WINDOW_HEIGHT, reg);
- poke32(PANEL_PLANE_TL, 0);
- reg = ((var->yres - 1) << PANEL_PLANE_BR_BOTTOM_SHIFT) &
- PANEL_PLANE_BR_BOTTOM_MASK;
- reg |= ((var->xres - 1) & PANEL_PLANE_BR_RIGHT_MASK);
- poke32(PANEL_PLANE_BR, reg);
- /* set pixel format */
- reg = peek32(PANEL_DISPLAY_CTRL);
- poke32(PANEL_DISPLAY_CTRL, reg | (var->bits_per_pixel >> 4));
- } else {
- /* not implemented now */
- poke32(CRT_FB_ADDRESS, crtc->oScreen);
- reg = var->xres * (var->bits_per_pixel >> 3);
- /*
- * crtc->channel is not equal to par->index on numeric,
- * be aware of that
- */
- reg = ALIGN(reg, crtc->line_pad) << CRT_FB_WIDTH_WIDTH_SHIFT;
- reg &= CRT_FB_WIDTH_WIDTH_MASK;
- reg |= (fix->line_length & CRT_FB_WIDTH_OFFSET_MASK);
- poke32(CRT_FB_WIDTH, reg);
- /* SET PIXEL FORMAT */
- reg = peek32(CRT_DISPLAY_CTRL);
- reg |= ((var->bits_per_pixel >> 4) &
- CRT_DISPLAY_CTRL_FORMAT_MASK);
- poke32(CRT_DISPLAY_CTRL, reg);
- }
- exit:
- return ret;
- }
- int hw_sm750_setColReg(struct lynxfb_crtc *crtc, ushort index,
- ushort red, ushort green, ushort blue)
- {
- static unsigned int add[] = {PANEL_PALETTE_RAM, CRT_PALETTE_RAM};
- poke32(add[crtc->channel] + index * 4,
- (red << 16) | (green << 8) | blue);
- return 0;
- }
- int hw_sm750le_setBLANK(struct lynxfb_output *output, int blank)
- {
- int dpms, crtdb;
- switch (blank) {
- case FB_BLANK_UNBLANK:
- dpms = CRT_DISPLAY_CTRL_DPMS_0;
- crtdb = 0;
- break;
- case FB_BLANK_NORMAL:
- dpms = CRT_DISPLAY_CTRL_DPMS_0;
- crtdb = CRT_DISPLAY_CTRL_BLANK;
- break;
- case FB_BLANK_VSYNC_SUSPEND:
- dpms = CRT_DISPLAY_CTRL_DPMS_2;
- crtdb = CRT_DISPLAY_CTRL_BLANK;
- break;
- case FB_BLANK_HSYNC_SUSPEND:
- dpms = CRT_DISPLAY_CTRL_DPMS_1;
- crtdb = CRT_DISPLAY_CTRL_BLANK;
- break;
- case FB_BLANK_POWERDOWN:
- dpms = CRT_DISPLAY_CTRL_DPMS_3;
- crtdb = CRT_DISPLAY_CTRL_BLANK;
- break;
- default:
- return -EINVAL;
- }
- if (output->paths & sm750_crt) {
- unsigned int val;
- val = peek32(CRT_DISPLAY_CTRL) & ~CRT_DISPLAY_CTRL_DPMS_MASK;
- poke32(CRT_DISPLAY_CTRL, val | dpms);
- val = peek32(CRT_DISPLAY_CTRL) & ~CRT_DISPLAY_CTRL_BLANK;
- poke32(CRT_DISPLAY_CTRL, val | crtdb);
- }
- return 0;
- }
- int hw_sm750_setBLANK(struct lynxfb_output *output, int blank)
- {
- unsigned int dpms, pps, crtdb;
- dpms = 0;
- pps = 0;
- crtdb = 0;
- switch (blank) {
- case FB_BLANK_UNBLANK:
- pr_debug("flag = FB_BLANK_UNBLANK\n");
- dpms = SYSTEM_CTRL_DPMS_VPHP;
- pps = PANEL_DISPLAY_CTRL_DATA;
- break;
- case FB_BLANK_NORMAL:
- pr_debug("flag = FB_BLANK_NORMAL\n");
- dpms = SYSTEM_CTRL_DPMS_VPHP;
- crtdb = CRT_DISPLAY_CTRL_BLANK;
- break;
- case FB_BLANK_VSYNC_SUSPEND:
- dpms = SYSTEM_CTRL_DPMS_VNHP;
- crtdb = CRT_DISPLAY_CTRL_BLANK;
- break;
- case FB_BLANK_HSYNC_SUSPEND:
- dpms = SYSTEM_CTRL_DPMS_VPHN;
- crtdb = CRT_DISPLAY_CTRL_BLANK;
- break;
- case FB_BLANK_POWERDOWN:
- dpms = SYSTEM_CTRL_DPMS_VNHN;
- crtdb = CRT_DISPLAY_CTRL_BLANK;
- break;
- }
- if (output->paths & sm750_crt) {
- unsigned int val = peek32(SYSTEM_CTRL) & ~SYSTEM_CTRL_DPMS_MASK;
- poke32(SYSTEM_CTRL, val | dpms);
- val = peek32(CRT_DISPLAY_CTRL) & ~CRT_DISPLAY_CTRL_BLANK;
- poke32(CRT_DISPLAY_CTRL, val | crtdb);
- }
- if (output->paths & sm750_panel) {
- unsigned int val = peek32(PANEL_DISPLAY_CTRL);
- val &= ~PANEL_DISPLAY_CTRL_DATA;
- val |= pps;
- poke32(PANEL_DISPLAY_CTRL, val);
- }
- return 0;
- }
- void hw_sm750_initAccel(struct sm750_dev *sm750_dev)
- {
- u32 reg;
- sm750_enable_2d_engine(1);
- if (sm750_get_chip_type() == SM750LE) {
- reg = peek32(DE_STATE1);
- reg |= DE_STATE1_DE_ABORT;
- poke32(DE_STATE1, reg);
- reg = peek32(DE_STATE1);
- reg &= ~DE_STATE1_DE_ABORT;
- poke32(DE_STATE1, reg);
- } else {
- /* engine reset */
- reg = peek32(SYSTEM_CTRL);
- reg |= SYSTEM_CTRL_DE_ABORT;
- poke32(SYSTEM_CTRL, reg);
- reg = peek32(SYSTEM_CTRL);
- reg &= ~SYSTEM_CTRL_DE_ABORT;
- poke32(SYSTEM_CTRL, reg);
- }
- /* call 2d init */
- sm750_dev->accel.de_init(&sm750_dev->accel);
- }
- int hw_sm750le_deWait(void)
- {
- int i = 0x10000000;
- unsigned int mask = DE_STATE2_DE_STATUS_BUSY | DE_STATE2_DE_FIFO_EMPTY |
- DE_STATE2_DE_MEM_FIFO_EMPTY;
- while (i--) {
- unsigned int val = peek32(DE_STATE2);
- if ((val & mask) ==
- (DE_STATE2_DE_FIFO_EMPTY | DE_STATE2_DE_MEM_FIFO_EMPTY))
- return 0;
- }
- /* timeout error */
- return -1;
- }
- int hw_sm750_deWait(void)
- {
- int i = 0x10000000;
- unsigned int mask = SYSTEM_CTRL_DE_STATUS_BUSY |
- SYSTEM_CTRL_DE_FIFO_EMPTY |
- SYSTEM_CTRL_DE_MEM_FIFO_EMPTY;
- while (i--) {
- unsigned int val = peek32(SYSTEM_CTRL);
- if ((val & mask) ==
- (SYSTEM_CTRL_DE_FIFO_EMPTY | SYSTEM_CTRL_DE_MEM_FIFO_EMPTY))
- return 0;
- }
- /* timeout error */
- return -1;
- }
- int hw_sm750_pan_display(struct lynxfb_crtc *crtc,
- const struct fb_var_screeninfo *var,
- const struct fb_info *info)
- {
- u32 total;
- /* check params */
- if ((var->xoffset + var->xres > var->xres_virtual) ||
- (var->yoffset + var->yres > var->yres_virtual)) {
- return -EINVAL;
- }
- total = var->yoffset * info->fix.line_length +
- ((var->xoffset * var->bits_per_pixel) >> 3);
- total += crtc->oScreen;
- if (crtc->channel == sm750_primary) {
- poke32(PANEL_FB_ADDRESS,
- peek32(PANEL_FB_ADDRESS) |
- (total & PANEL_FB_ADDRESS_ADDRESS_MASK));
- } else {
- poke32(CRT_FB_ADDRESS,
- peek32(CRT_FB_ADDRESS) |
- (total & CRT_FB_ADDRESS_ADDRESS_MASK));
- }
- return 0;
- }