1 /* 2 * Broadcom specific AMBA 3 * Core ops 4 * 5 * Licensed under the GNU/GPL. See COPYING for details. 6 */ 7 8 #include "bcma_private.h" 9 #include <linux/bcma/bcma.h> 10 11 bool bcma_core_is_enabled(struct bcma_device *core) 12 { 13 if ((bcma_aread32(core, BCMA_IOCTL) & (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC)) 14 != BCMA_IOCTL_CLK) 15 return false; 16 if (bcma_aread32(core, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET) 17 return false; 18 return true; 19 } 20 EXPORT_SYMBOL_GPL(bcma_core_is_enabled); 21 22 static void bcma_core_disable(struct bcma_device *core, u32 flags) 23 { 24 if (bcma_aread32(core, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET) 25 return; 26 27 bcma_awrite32(core, BCMA_IOCTL, flags); 28 bcma_aread32(core, BCMA_IOCTL); 29 udelay(10); 30 31 bcma_awrite32(core, BCMA_RESET_CTL, BCMA_RESET_CTL_RESET); 32 udelay(1); 33 } 34 35 int bcma_core_enable(struct bcma_device *core, u32 flags) 36 { 37 bcma_core_disable(core, flags); 38 39 bcma_awrite32(core, BCMA_IOCTL, (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC | flags)); 40 bcma_aread32(core, BCMA_IOCTL); 41 42 bcma_awrite32(core, BCMA_RESET_CTL, 0); 43 udelay(1); 44 45 bcma_awrite32(core, BCMA_IOCTL, (BCMA_IOCTL_CLK | flags)); 46 bcma_aread32(core, BCMA_IOCTL); 47 udelay(1); 48 49 return 0; 50 } 51 EXPORT_SYMBOL_GPL(bcma_core_enable); 52