14  * drivers/video/cirrusfb.c - driver for Cirrus Logic chipsets
23 #include <video/cirrus.h>
48 #define DRIVER_NAME "cirrus"
49 #define DRIVER_DESC "qemu cirrus vga"
100 static u8 rreg_seq(struct cirrus_device *cirrus, u8 reg)  in rreg_seq()  argument
102 	iowrite8(reg, cirrus->mmio + SEQ_INDEX);  in rreg_seq()
103 	return ioread8(cirrus->mmio + SEQ_DATA);  in rreg_seq()
106 static void wreg_seq(struct cirrus_device *cirrus, u8 reg, u8 val)  in wreg_seq()  argument
108 	iowrite8(reg, cirrus->mmio + SEQ_INDEX);  in wreg_seq()
109 	iowrite8(val, cirrus->mmio + SEQ_DATA);  in wreg_seq()
115 static u8 rreg_crt(struct cirrus_device *cirrus, u8 reg)  in rreg_crt()  argument
117 	iowrite8(reg, cirrus->mmio + CRT_INDEX);  in rreg_crt()
118 	return ioread8(cirrus->mmio + CRT_DATA);  in rreg_crt()
121 static void wreg_crt(struct cirrus_device *cirrus, u8 reg, u8 val)  in wreg_crt()  argument
123 	iowrite8(reg, cirrus->mmio + CRT_INDEX);  in wreg_crt()
124 	iowrite8(val, cirrus->mmio + CRT_DATA);  in wreg_crt()
130 static void wreg_gfx(struct cirrus_device *cirrus, u8 reg, u8 val)  in wreg_gfx()  argument
132 	iowrite8(reg, cirrus->mmio + GFX_INDEX);  in wreg_gfx()
133 	iowrite8(val, cirrus->mmio + GFX_DATA);  in wreg_gfx()
138 static void wreg_hdr(struct cirrus_device *cirrus, u8 val)  in wreg_hdr()  argument
140 	ioread8(cirrus->mmio + VGA_DAC_MASK);  in wreg_hdr()
141 	ioread8(cirrus->mmio + VGA_DAC_MASK);  in wreg_hdr()
142 	ioread8(cirrus->mmio + VGA_DAC_MASK);  in wreg_hdr()
143 	ioread8(cirrus->mmio + VGA_DAC_MASK);  in wreg_hdr()
144 	iowrite8(val, cirrus->mmio + VGA_DAC_MASK);  in wreg_hdr()
178 static void cirrus_set_start_address(struct cirrus_device *cirrus, u32 offset)  in cirrus_set_start_address()  argument
184 	wreg_crt(cirrus, 0x0c, (u8)((addr >> 8) & 0xff));  in cirrus_set_start_address()
185 	wreg_crt(cirrus, 0x0d, (u8)(addr & 0xff));  in cirrus_set_start_address()
187 	tmp = rreg_crt(cirrus, 0x1b);  in cirrus_set_start_address()
191 	wreg_crt(cirrus, 0x1b, tmp);  in cirrus_set_start_address()
193 	tmp = rreg_crt(cirrus, 0x1d);  in cirrus_set_start_address()
196 	wreg_crt(cirrus, 0x1d, tmp);  in cirrus_set_start_address()
199 static void cirrus_mode_set(struct cirrus_device *cirrus,  in cirrus_mode_set()  argument
222 	wreg_crt(cirrus, VGA_CRTC_V_SYNC_END, 0x20);  in cirrus_mode_set()
223 	wreg_crt(cirrus, VGA_CRTC_H_TOTAL, htotal);  in cirrus_mode_set()
224 	wreg_crt(cirrus, VGA_CRTC_H_DISP, hdispend);  in cirrus_mode_set()
225 	wreg_crt(cirrus, VGA_CRTC_H_SYNC_START, hsyncstart);  in cirrus_mode_set()
226 	wreg_crt(cirrus, VGA_CRTC_H_SYNC_END, hsyncend);  in cirrus_mode_set()
227 	wreg_crt(cirrus, VGA_CRTC_V_TOTAL, vtotal & 0xff);  in cirrus_mode_set()
228 	wreg_crt(cirrus, VGA_CRTC_V_DISP_END, vdispend & 0xff);  in cirrus_mode_set()
233 	wreg_crt(cirrus, VGA_CRTC_MAX_SCAN, tmp);  in cirrus_mode_set()
249 	wreg_crt(cirrus, VGA_CRTC_OVERFLOW, tmp);  in cirrus_mode_set()
264 	wreg_crt(cirrus, CL_CRT1A, tmp);  in cirrus_mode_set()
267 	wreg_crt(cirrus, VGA_CRTC_MODE, 0x03);  in cirrus_mode_set()
270 static void cirrus_format_set(struct cirrus_device *cirrus,  in cirrus_format_set()  argument
275 	sr07 = rreg_seq(cirrus, 0x07);  in cirrus_format_set()
299 	wreg_seq(cirrus, 0x7, sr07);  in cirrus_format_set()
302 	wreg_gfx(cirrus, VGA_GFX_MODE, 0x40);  in cirrus_format_set()
305 	wreg_gfx(cirrus, VGA_GFX_MISC, 0x01);  in cirrus_format_set()
307 	wreg_hdr(cirrus, hdr);  in cirrus_format_set()
310 static void cirrus_pitch_set(struct cirrus_device *cirrus, unsigned int pitch)  in cirrus_pitch_set()  argument
316 	wreg_crt(cirrus, VGA_CRTC_OFFSET, cr13);  in cirrus_pitch_set()
322 	wreg_crt(cirrus, 0x1b, cr1b);  in cirrus_pitch_set()
324 	cirrus_set_start_address(cirrus, 0);  in cirrus_pitch_set()
328 /* cirrus display pipe						      */
382 	struct cirrus_device *cirrus = to_cirrus(plane->dev);  in cirrus_primary_plane_helper_atomic_update()  local
393 	struct iosys_map vaddr = IOSYS_MAP_INIT_VADDR_IOMEM(cirrus->vram);  in cirrus_primary_plane_helper_atomic_update()
401 	if (!drm_dev_enter(&cirrus->dev, &idx))  in cirrus_primary_plane_helper_atomic_update()
405 		cirrus_format_set(cirrus, format);  in cirrus_primary_plane_helper_atomic_update()
407 		cirrus_pitch_set(cirrus, pitch);  in cirrus_primary_plane_helper_atomic_update()
503 	struct cirrus_device *cirrus = to_cirrus(crtc->dev);  in cirrus_crtc_helper_atomic_enable()  local
507 	if (!drm_dev_enter(&cirrus->dev, &idx))  in cirrus_crtc_helper_atomic_enable()
510 	cirrus_mode_set(cirrus, &crtc_state->mode);  in cirrus_crtc_helper_atomic_enable()
559 static int cirrus_pipe_init(struct cirrus_device *cirrus)  in cirrus_pipe_init()  argument
561 	struct drm_device *dev = &cirrus->dev;  in cirrus_pipe_init()
568 	primary_plane = &cirrus->primary_plane;  in cirrus_pipe_init()
580 	crtc = &cirrus->crtc;  in cirrus_pipe_init()
587 	encoder = &cirrus->encoder;  in cirrus_pipe_init()
594 	connector = &cirrus->connector;  in cirrus_pipe_init()
609 /* cirrus framebuffers & mode config				      */
630 static int cirrus_mode_config_init(struct cirrus_device *cirrus)  in cirrus_mode_config_init()  argument
632 	struct drm_device *dev = &cirrus->dev;  in cirrus_mode_config_init()
671 	struct cirrus_device *cirrus;  in cirrus_pci_probe()  local
687 	cirrus = devm_drm_dev_alloc(&pdev->dev, &cirrus_driver,  in cirrus_pci_probe()
689 	if (IS_ERR(cirrus))  in cirrus_pci_probe()
690 		return PTR_ERR(cirrus);  in cirrus_pci_probe()
692 	dev = &cirrus->dev;  in cirrus_pci_probe()
694 	cirrus->vram = devm_ioremap(&pdev->dev, pci_resource_start(pdev, 0),  in cirrus_pci_probe()
696 	if (cirrus->vram == NULL)  in cirrus_pci_probe()
699 	cirrus->mmio = devm_ioremap(&pdev->dev, pci_resource_start(pdev, 1),  in cirrus_pci_probe()
701 	if (cirrus->mmio == NULL)  in cirrus_pci_probe()
704 	ret = cirrus_mode_config_init(cirrus);  in cirrus_pci_probe()
708 	ret = cirrus_pipe_init(cirrus);  in cirrus_pci_probe()
740 		/* only bind to the cirrus chip in qemu */
763 MODULE_DESCRIPTION("Cirrus driver for QEMU emulated device");