| 1 | /* |
| 2 | * OMAP3-specific clock framework functions |
| 3 | * |
| 4 | * Copyright (C) 2007-2008 Texas Instruments, Inc. |
| 5 | * Copyright (C) 2007-2011 Nokia Corporation |
| 6 | * |
| 7 | * Paul Walmsley |
| 8 | * Jouni Högander |
| 9 | * |
| 10 | * Parts of this code are based on code written by |
| 11 | * Richard Woodruff, Tony Lindgren, Tuukka Tikkanen, Karthik Dasu, |
| 12 | * Russell King |
| 13 | * |
| 14 | * This program is free software; you can redistribute it and/or modify |
| 15 | * it under the terms of the GNU General Public License version 2 as |
| 16 | * published by the Free Software Foundation. |
| 17 | */ |
| 18 | #undef DEBUG |
| 19 | |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/clk.h> |
| 22 | #include <linux/io.h> |
| 23 | |
| 24 | #include "clock.h" |
| 25 | #include "clock34xx.h" |
| 26 | #include "cm3xxx.h" |
| 27 | #include "cm-regbits-34xx.h" |
| 28 | |
| 29 | /** |
| 30 | * omap3430es2_clk_ssi_find_idlest - return CM_IDLEST info for SSI |
| 31 | * @clk: struct clk * being enabled |
| 32 | * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into |
| 33 | * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into |
| 34 | * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator |
| 35 | * |
| 36 | * The OMAP3430ES2 SSI target CM_IDLEST bit is at a different shift |
| 37 | * from the CM_{I,F}CLKEN bit. Pass back the correct info via |
| 38 | * @idlest_reg and @idlest_bit. No return value. |
| 39 | */ |
| 40 | static void omap3430es2_clk_ssi_find_idlest(struct clk_hw_omap *clk, |
| 41 | void __iomem **idlest_reg, |
| 42 | u8 *idlest_bit, |
| 43 | u8 *idlest_val) |
| 44 | { |
| 45 | u32 r; |
| 46 | |
| 47 | r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20); |
| 48 | *idlest_reg = (__force void __iomem *)r; |
| 49 | *idlest_bit = OMAP3430ES2_ST_SSI_IDLE_SHIFT; |
| 50 | *idlest_val = OMAP34XX_CM_IDLEST_VAL; |
| 51 | } |
| 52 | const struct clk_hw_omap_ops clkhwops_omap3430es2_ssi_wait = { |
| 53 | .find_idlest = omap3430es2_clk_ssi_find_idlest, |
| 54 | .find_companion = omap2_clk_dflt_find_companion, |
| 55 | }; |
| 56 | |
| 57 | const struct clk_hw_omap_ops clkhwops_omap3430es2_iclk_ssi_wait = { |
| 58 | .allow_idle = omap2_clkt_iclk_allow_idle, |
| 59 | .deny_idle = omap2_clkt_iclk_deny_idle, |
| 60 | .find_idlest = omap3430es2_clk_ssi_find_idlest, |
| 61 | .find_companion = omap2_clk_dflt_find_companion, |
| 62 | }; |
| 63 | |
| 64 | /** |
| 65 | * omap3430es2_clk_dss_usbhost_find_idlest - CM_IDLEST info for DSS, USBHOST |
| 66 | * @clk: struct clk * being enabled |
| 67 | * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into |
| 68 | * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into |
| 69 | * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator |
| 70 | * |
| 71 | * Some OMAP modules on OMAP3 ES2+ chips have both initiator and |
| 72 | * target IDLEST bits. For our purposes, we are concerned with the |
| 73 | * target IDLEST bits, which exist at a different bit position than |
| 74 | * the *CLKEN bit position for these modules (DSS and USBHOST) (The |
| 75 | * default find_idlest code assumes that they are at the same |
| 76 | * position.) No return value. |
| 77 | */ |
| 78 | static void omap3430es2_clk_dss_usbhost_find_idlest(struct clk_hw_omap *clk, |
| 79 | void __iomem **idlest_reg, |
| 80 | u8 *idlest_bit, |
| 81 | u8 *idlest_val) |
| 82 | { |
| 83 | u32 r; |
| 84 | |
| 85 | r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20); |
| 86 | *idlest_reg = (__force void __iomem *)r; |
| 87 | /* USBHOST_IDLE has same shift */ |
| 88 | *idlest_bit = OMAP3430ES2_ST_DSS_IDLE_SHIFT; |
| 89 | *idlest_val = OMAP34XX_CM_IDLEST_VAL; |
| 90 | } |
| 91 | |
| 92 | const struct clk_hw_omap_ops clkhwops_omap3430es2_dss_usbhost_wait = { |
| 93 | .find_idlest = omap3430es2_clk_dss_usbhost_find_idlest, |
| 94 | .find_companion = omap2_clk_dflt_find_companion, |
| 95 | }; |
| 96 | |
| 97 | const struct clk_hw_omap_ops clkhwops_omap3430es2_iclk_dss_usbhost_wait = { |
| 98 | .allow_idle = omap2_clkt_iclk_allow_idle, |
| 99 | .deny_idle = omap2_clkt_iclk_deny_idle, |
| 100 | .find_idlest = omap3430es2_clk_dss_usbhost_find_idlest, |
| 101 | .find_companion = omap2_clk_dflt_find_companion, |
| 102 | }; |
| 103 | |
| 104 | /** |
| 105 | * omap3430es2_clk_hsotgusb_find_idlest - return CM_IDLEST info for HSOTGUSB |
| 106 | * @clk: struct clk * being enabled |
| 107 | * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into |
| 108 | * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into |
| 109 | * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator |
| 110 | * |
| 111 | * The OMAP3430ES2 HSOTGUSB target CM_IDLEST bit is at a different |
| 112 | * shift from the CM_{I,F}CLKEN bit. Pass back the correct info via |
| 113 | * @idlest_reg and @idlest_bit. No return value. |
| 114 | */ |
| 115 | static void omap3430es2_clk_hsotgusb_find_idlest(struct clk_hw_omap *clk, |
| 116 | void __iomem **idlest_reg, |
| 117 | u8 *idlest_bit, |
| 118 | u8 *idlest_val) |
| 119 | { |
| 120 | u32 r; |
| 121 | |
| 122 | r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20); |
| 123 | *idlest_reg = (__force void __iomem *)r; |
| 124 | *idlest_bit = OMAP3430ES2_ST_HSOTGUSB_IDLE_SHIFT; |
| 125 | *idlest_val = OMAP34XX_CM_IDLEST_VAL; |
| 126 | } |
| 127 | |
| 128 | const struct clk_hw_omap_ops clkhwops_omap3430es2_iclk_hsotgusb_wait = { |
| 129 | .allow_idle = omap2_clkt_iclk_allow_idle, |
| 130 | .deny_idle = omap2_clkt_iclk_deny_idle, |
| 131 | .find_idlest = omap3430es2_clk_hsotgusb_find_idlest, |
| 132 | .find_companion = omap2_clk_dflt_find_companion, |
| 133 | }; |
| 134 | |
| 135 | const struct clk_hw_omap_ops clkhwops_omap3430es2_hsotgusb_wait = { |
| 136 | .find_idlest = omap3430es2_clk_hsotgusb_find_idlest, |
| 137 | .find_companion = omap2_clk_dflt_find_companion, |
| 138 | }; |