diff options
Diffstat (limited to 'drivers/video/fbdev/vermilion/cr_pll.c')
| -rw-r--r-- | drivers/video/fbdev/vermilion/cr_pll.c | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/drivers/video/fbdev/vermilion/cr_pll.c b/drivers/video/fbdev/vermilion/cr_pll.c deleted file mode 100644 index 79d42b23d85017..00000000000000 --- a/drivers/video/fbdev/vermilion/cr_pll.c +++ /dev/null @@ -1,195 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * Copyright (c) Intel Corp. 2007. - * All Rights Reserved. - * - * Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to - * develop this driver. - * - * This file is part of the Carillo Ranch video subsystem driver. - * - * Authors: - * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com> - * Alan Hourihane <alanh-at-tungstengraphics-dot-com> - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/pci.h> -#include <linux/errno.h> -#include <linux/fb.h> -#include "vermilion.h" - -/* The PLL Clock register sits on Host bridge */ -#define CRVML_DEVICE_MCH 0x5001 -#define CRVML_REG_MCHBAR 0x44 -#define CRVML_REG_MCHEN 0x54 -#define CRVML_MCHEN_BIT (1 << 28) -#define CRVML_MCHMAP_SIZE 4096 -#define CRVML_REG_CLOCK 0xc3c -#define CRVML_CLOCK_SHIFT 8 -#define CRVML_CLOCK_MASK 0x00000f00 - -static struct pci_dev *mch_dev; -static u32 mch_bar; -static void __iomem *mch_regs_base; -static u32 saved_clock; - -static const unsigned crvml_clocks[] = { - 6750, - 13500, - 27000, - 29700, - 37125, - 54000, - 59400, - 74250, - 120000 - /* - * There are more clocks, but they are disabled on the CR board. - */ -}; - -static const u32 crvml_clock_bits[] = { - 0x0a, - 0x09, - 0x08, - 0x07, - 0x06, - 0x05, - 0x04, - 0x03, - 0x0b -}; - -static const unsigned crvml_num_clocks = ARRAY_SIZE(crvml_clocks); - -static int crvml_sys_restore(struct vml_sys *sys) -{ - void __iomem *clock_reg = mch_regs_base + CRVML_REG_CLOCK; - - iowrite32(saved_clock, clock_reg); - ioread32(clock_reg); - - return 0; -} - -static int crvml_sys_save(struct vml_sys *sys) -{ - void __iomem *clock_reg = mch_regs_base + CRVML_REG_CLOCK; - - saved_clock = ioread32(clock_reg); - - return 0; -} - -static int crvml_nearest_index(const struct vml_sys *sys, int clock) -{ - int i; - int cur_index = 0; - int cur_diff; - int diff; - - cur_diff = clock - crvml_clocks[0]; - cur_diff = (cur_diff < 0) ? -cur_diff : cur_diff; - for (i = 1; i < crvml_num_clocks; ++i) { - diff = clock - crvml_clocks[i]; - diff = (diff < 0) ? -diff : diff; - if (diff < cur_diff) { - cur_index = i; - cur_diff = diff; - } - } - return cur_index; -} - -static int crvml_nearest_clock(const struct vml_sys *sys, int clock) -{ - return crvml_clocks[crvml_nearest_index(sys, clock)]; -} - -static int crvml_set_clock(struct vml_sys *sys, int clock) -{ - void __iomem *clock_reg = mch_regs_base + CRVML_REG_CLOCK; - int index; - u32 clock_val; - - index = crvml_nearest_index(sys, clock); - - if (crvml_clocks[index] != clock) - return -EINVAL; - - clock_val = ioread32(clock_reg) & ~CRVML_CLOCK_MASK; - clock_val = crvml_clock_bits[index] << CRVML_CLOCK_SHIFT; - iowrite32(clock_val, clock_reg); - ioread32(clock_reg); - - return 0; -} - -static struct vml_sys cr_pll_ops = { - .name = "Carillo Ranch", - .save = crvml_sys_save, - .restore = crvml_sys_restore, - .set_clock = crvml_set_clock, - .nearest_clock = crvml_nearest_clock, -}; - -static int __init cr_pll_init(void) -{ - int err; - u32 dev_en; - - mch_dev = pci_get_device(PCI_VENDOR_ID_INTEL, - CRVML_DEVICE_MCH, NULL); - if (!mch_dev) { - printk(KERN_ERR - "Could not find Carillo Ranch MCH device.\n"); - return -ENODEV; - } - - pci_read_config_dword(mch_dev, CRVML_REG_MCHEN, &dev_en); - if (!(dev_en & CRVML_MCHEN_BIT)) { - printk(KERN_ERR - "Carillo Ranch MCH device was not enabled.\n"); - pci_dev_put(mch_dev); - return -ENODEV; - } - - pci_read_config_dword(mch_dev, CRVML_REG_MCHBAR, - &mch_bar); - mch_regs_base = - ioremap(mch_bar, CRVML_MCHMAP_SIZE); - if (!mch_regs_base) { - printk(KERN_ERR - "Carillo Ranch MCH device was not enabled.\n"); - pci_dev_put(mch_dev); - return -ENODEV; - } - - err = vmlfb_register_subsys(&cr_pll_ops); - if (err) { - printk(KERN_ERR - "Carillo Ranch failed to initialize vml_sys.\n"); - iounmap(mch_regs_base); - pci_dev_put(mch_dev); - return err; - } - - return 0; -} - -static void __exit cr_pll_exit(void) -{ - vmlfb_unregister_subsys(&cr_pll_ops); - - iounmap(mch_regs_base); - pci_dev_put(mch_dev); -} - -module_init(cr_pll_init); -module_exit(cr_pll_exit); - -MODULE_AUTHOR("Tungsten Graphics Inc."); -MODULE_DESCRIPTION("Carillo Ranch PLL Driver"); -MODULE_LICENSE("GPL"); |