projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b47eb409 HS |
1 | /* |
| 2 | * High-Speed Bus Matrix helper functions | |
| 3 | * | |
| 4 | * Copyright (C) 2008 Atmel Corporation | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License version 2 as | |
| 8 | * published by the Free Software Foundation. | |
| 9 | */ | |
| 10 | #include <linux/clk.h> | |
| 11 | #include <linux/io.h> | |
| 12 | ||
| 13 | #include <mach/chip.h> | |
| 14 | #include <mach/hmatrix.h> | |
| 15 | ||
| 16 | static inline void __hmatrix_write_reg(unsigned long offset, u32 value) | |
| 17 | { | |
| 18 | __raw_writel(value, (void __iomem __force *)(HMATRIX_BASE + offset)); | |
| 19 | } | |
| 20 | ||
| 21 | static inline u32 __hmatrix_read_reg(unsigned long offset) | |
| 22 | { | |
| 23 | return __raw_readl((void __iomem __force *)(HMATRIX_BASE + offset)); | |
| 24 | } | |
| 25 | ||
| 26 | /** | |
| 27 | * hmatrix_write_reg - write HMATRIX configuration register | |
| 28 | * @offset: register offset | |
| 29 | * @value: value to be written to the register at @offset | |
| 30 | */ | |
| 31 | void hmatrix_write_reg(unsigned long offset, u32 value) | |
| 32 | { | |
| 33 | clk_enable(&at32_hmatrix_clk); | |
| 34 | __hmatrix_write_reg(offset, value); | |
| 35 | __hmatrix_read_reg(offset); | |
| 36 | clk_disable(&at32_hmatrix_clk); | |
| 37 | } | |
| 38 | ||
| 39 | /** | |
| 40 | * hmatrix_read_reg - read HMATRIX configuration register | |
| 41 | * @offset: register offset | |
| 42 | * | |
| 43 | * Returns the value of the register at @offset. | |
| 44 | */ | |
| 45 | u32 hmatrix_read_reg(unsigned long offset) | |
| 46 | { | |
| 47 | u32 value; | |
| 48 | ||
| 49 | clk_enable(&at32_hmatrix_clk); | |
| 50 | value = __hmatrix_read_reg(offset); | |
| 51 | clk_disable(&at32_hmatrix_clk); | |
| 52 | ||
| 53 | return value; | |
| 54 | } | |
| 55 | ||
| 56 | /** | |
| 57 | * hmatrix_sfr_set_bits - set bits in a slave's Special Function Register | |
| 58 | * @slave_id: operate on the SFR belonging to this slave | |
| 59 | * @mask: mask of bits to be set in the SFR | |
| 60 | */ | |
| 61 | void hmatrix_sfr_set_bits(unsigned int slave_id, u32 mask) | |
| 62 | { | |
| 63 | u32 value; | |
| 64 | ||
| 65 | clk_enable(&at32_hmatrix_clk); | |
| 66 | value = __hmatrix_read_reg(HMATRIX_SFR(slave_id)); | |
| 67 | value |= mask; | |
| 68 | __hmatrix_write_reg(HMATRIX_SFR(slave_id), value); | |
| 69 | __hmatrix_read_reg(HMATRIX_SFR(slave_id)); | |
| 70 | clk_disable(&at32_hmatrix_clk); | |
| 71 | } | |
| 72 | ||
| 73 | /** | |
| 74 | * hmatrix_sfr_set_bits - clear bits in a slave's Special Function Register | |
| 75 | * @slave_id: operate on the SFR belonging to this slave | |
| 76 | * @mask: mask of bits to be cleared in the SFR | |
| 77 | */ | |
| 78 | void hmatrix_sfr_clear_bits(unsigned int slave_id, u32 mask) | |
| 79 | { | |
| 80 | u32 value; | |
| 81 | ||
| 82 | clk_enable(&at32_hmatrix_clk); | |
| 83 | value = __hmatrix_read_reg(HMATRIX_SFR(slave_id)); | |
| 84 | value &= ~mask; | |
| 85 | __hmatrix_write_reg(HMATRIX_SFR(slave_id), value); | |
| 86 | __hmatrix_read_reg(HMATRIX_SFR(slave_id)); | |
| 87 | clk_disable(&at32_hmatrix_clk); | |
| 88 | } |