From patchwork Wed Nov 25 04:09:13 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nishanth Menon X-Patchwork-Id: 62675 X-Patchwork-Delegate: khilman@deeprootsystems.com Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id nAP49gTw007073 for ; Wed, 25 Nov 2009 04:09:43 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934514AbZKYEJe (ORCPT ); Tue, 24 Nov 2009 23:09:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S934498AbZKYEJd (ORCPT ); Tue, 24 Nov 2009 23:09:33 -0500 Received: from arroyo.ext.ti.com ([192.94.94.40]:59715 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934503AbZKYEJ1 (ORCPT ); Tue, 24 Nov 2009 23:09:27 -0500 Received: from dlep34.itg.ti.com ([157.170.170.115]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id nAP49WX8032225 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 24 Nov 2009 22:09:32 -0600 Received: from legion.dal.design.ti.com (localhost [127.0.0.1]) by dlep34.itg.ti.com (8.13.7/8.13.7) with ESMTP id nAP49QVx019842; Tue, 24 Nov 2009 22:09:26 -0600 (CST) Received: from senorita (senorita.am.dhcp.ti.com [128.247.75.1]) by legion.dal.design.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id nAP49PZ29773; Tue, 24 Nov 2009 22:09:25 -0600 (CST) Received: by senorita (Postfix, from userid 1000) id B0B78C1DD; Tue, 24 Nov 2009 22:09:24 -0600 (CST) From: Nishanth Menon To: linux-omap Cc: Nishanth Menon , Benoit Cousson , Kevin Hilman , Madhusudhan Chikkature Rajashekar , Paul Walmsley , Romit Dasgupta , Sanjeev Premi , Santosh Shilimkar , Sergio Alberto Aguirre Rodriguez , Thara Gopinath , Vishwanath Sripathy Subject: [PATCH 04/10 V3] omap3: pm: srf: use opp accessor functions Date: Tue, 24 Nov 2009 22:09:13 -0600 Message-Id: <1259122159-1583-5-git-send-email-nm@ti.com> X-Mailer: git-send-email 1.6.3.3 In-Reply-To: <1259122159-1583-4-git-send-email-nm@ti.com> References: <1259122159-1583-1-git-send-email-nm@ti.com> <1259122159-1583-2-git-send-email-nm@ti.com> <1259122159-1583-3-git-send-email-nm@ti.com> <1259122159-1583-4-git-send-email-nm@ti.com> Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org diff --git a/arch/arm/mach-omap2/resource34xx.c b/arch/arm/mach-omap2/resource34xx.c index af6b3c1..349f54e 100644 --- a/arch/arm/mach-omap2/resource34xx.c +++ b/arch/arm/mach-omap2/resource34xx.c @@ -155,21 +155,68 @@ static int curr_vdd1_opp; static int curr_vdd2_opp; static DEFINE_MUTEX(dvfs_mutex); -static unsigned short get_opp(struct omap_opp *opp_freq_table, +/* Introducing deprecated function because we got to.. */ +#define IS_OPP_TERMINATOR(opps, i) (!(opps)[(i)].enabled &&\ + ((opps)[(i)].rate == 0) && ((opps)[(i)].vsel == 0)) + +/** + * opp_to_freq - convert OPPID to frequency (DEPRECATED) + * @freq: return frequency back to caller + * @opps: opp list + * @opp_id: OPP ID we are searching for + * + * return 0 and freq is populated if we find the opp_id, else, + * we return error + * + * NOTE: this function is a standin for the timebeing as opp_id is deprecated + */ +static int __deprecated opp_to_freq(unsigned long *freq, + const struct omap_opp *opps, u8 opp_id) +{ + int i = 1; + + BUG_ON(!freq || !opps); + + /* The first entry is a dummy one, loop till we hit terminator */ + while (!IS_OPP_TERMINATOR(opps, i)) { + if (opps[i].enabled && (opps[i].opp_id == opp_id)) { + *freq = opps[i].rate; + return 0; + } + i++; + } + + return -EINVAL; +} + +/** + * freq_to_opp - convert a frequency back to OPP ID (DEPRECATED) + * @opp_id: opp ID returned back to caller + * @opps: opp list + * @freq: frequency we are searching for + * + * return 0 and opp_id is populated if we find the freq, else, + * we return error + * + * NOTE: this function is a standin for the timebeing as opp_id is deprecated + */ +static int __deprecated freq_to_opp(u8 *opp_id, const struct omap_opp *opps, unsigned long freq) { - struct omap_opp *prcm_config; - prcm_config = opp_freq_table; - - if (prcm_config->rate <= freq) - return prcm_config->opp_id; /* Return the Highest OPP */ - for (; prcm_config->rate; prcm_config--) - if (prcm_config->rate < freq) - return (prcm_config+1)->opp_id; - else if (prcm_config->rate == freq) - return prcm_config->opp_id; - /* Return the least OPP */ - return (prcm_config+1)->opp_id; + int i = 1; + + BUG_ON(!opp_id || !opps); + + /* The first entry is a dummy one, loop till we hit terminator */ + while (!IS_OPP_TERMINATOR(opps, i)) { + if (opps[i].enabled && (opps[i].rate == freq)) { + *opp_id = opps[i].opp_id; + return 0; + } + i++; + } + + return -EINVAL; } /** @@ -178,6 +225,8 @@ static unsigned short get_opp(struct omap_opp *opp_freq_table, void init_opp(struct shared_resource *resp) { struct clk *l3_clk; + int ret; + u8 opp_id; resp->no_of_users = 0; if (!mpu_opps || !dsp_opps || !l3_opps) @@ -190,17 +239,18 @@ void init_opp(struct shared_resource *resp) vdd1_resp = resp; dpll1_clk = clk_get(NULL, "dpll1_ck"); dpll2_clk = clk_get(NULL, "dpll2_ck"); - resp->curr_level = get_opp(mpu_opps + MAX_VDD1_OPP, - dpll1_clk->rate); - curr_vdd1_opp = resp->curr_level; + ret = freq_to_opp(&opp_id, mpu_opps, dpll1_clk->rate); + BUG_ON(ret); /* TBD Cleanup handling */ + curr_vdd1_opp = opp_id; } else if (strcmp(resp->name, "vdd2_opp") == 0) { vdd2_resp = resp; dpll3_clk = clk_get(NULL, "dpll3_m2_ck"); l3_clk = clk_get(NULL, "l3_ick"); - resp->curr_level = get_opp(l3_opps + MAX_VDD2_OPP, - l3_clk->rate); - curr_vdd2_opp = resp->curr_level; + ret = freq_to_opp(&opp_id, l3_opps, l3_clk->rate); + BUG_ON(ret); /* TBD Cleanup handling */ + curr_vdd2_opp = opp_id; } + resp->curr_level = opp_id; return; } @@ -242,24 +292,40 @@ static int program_opp_freq(int res, int target_level, int current_level) { int ret = 0, l3_div; int *curr_opp; + unsigned long mpu_freq, dsp_freq, l3_freq; +#ifndef CONFIG_CPU_FREQ + unsigned long mpu_cur_freq +#endif + + /* Check if I can actually switch or not */ + if (res == VDD1_OPP) { + ret = opp_to_freq(&mpu_freq, mpu_opps, target_level); + ret |= opp_to_freq(&dsp_freq, dsp_opps, target_level); +#ifndef CONFIG_CPU_FREQ + ret |= opp_to_freq(&mpu_cur_freq, mpu_opps, current_level); +#endif + } else { + ret = opp_to_freq(&l3_freq, l3_opps, target_level); + } + /* we would have caught all bad levels earlier.. */ + if (unlikely(ret)) + return ret; lock_scratchpad_sem(); if (res == VDD1_OPP) { curr_opp = &curr_vdd1_opp; - clk_set_rate(dpll1_clk, mpu_opps[target_level].rate); - clk_set_rate(dpll2_clk, dsp_opps[target_level].rate); + clk_set_rate(dpll1_clk, mpu_freq); + clk_set_rate(dpll2_clk, dsp_freq); #ifndef CONFIG_CPU_FREQ /*Update loops_per_jiffy if processor speed is being changed*/ loops_per_jiffy = compute_lpj(loops_per_jiffy, - mpu_opps[current_level].rate/1000, - mpu_opps[target_level].rate/1000); + mpu_cur_freq / 1000, mpu_freq / 1000); #endif } else { curr_opp = &curr_vdd2_opp; l3_div = cm_read_mod_reg(CORE_MOD, CM_CLKSEL) & OMAP3430_CLKSEL_L3_MASK; - ret = clk_set_rate(dpll3_clk, - l3_opps[target_level].rate * l3_div); + ret = clk_set_rate(dpll3_clk, l3_freq * l3_div); } if (ret) { unlock_scratchpad_sem(); @@ -278,6 +344,7 @@ static int program_opp(int res, struct omap_opp *opp, int target_level, int current_level) { int i, ret = 0, raise; + unsigned long freq; #ifdef CONFIG_OMAP_SMARTREFLEX unsigned long t_opp, c_opp; @@ -285,13 +352,10 @@ static int program_opp(int res, struct omap_opp *opp, int target_level, c_opp = ID_VDD(res) | ID_OPP_NO(opp[current_level].opp_id); #endif - /* Only allow enabled OPPs */ - if (!opp[target_level].enabled) - return -EINVAL; - - /* Sanity check of the OPP params before attempting to set */ - if (!opp[target_level].rate || !opp[target_level].vsel) - return -EINVAL; + /* See if have a freq associated, if not, invalid opp */ + ret = opp_to_freq(&freq, opp, target_level); + if (unlikely(ret)) + return ret; if (target_level > current_level) raise = 1; @@ -303,10 +367,23 @@ static int program_opp(int res, struct omap_opp *opp, int target_level, ret = program_opp_freq(res, target_level, current_level); #ifdef CONFIG_OMAP_SMARTREFLEX - else - sr_voltagescale_vcbypass(t_opp, c_opp, - opp[target_level].vsel, - opp[current_level].vsel); + else { + u8 vc, vt; + struct omap_opp *oppx; + /* + * transitioning from good to good OPP + * none of the following should fail.. + */ + BUG_ON(opp_is_valid(&oppx, opp, freq)); + vt = oppx->vsel; + + BUG_ON(opp_to_freq(&freq, opp, current_level)); + BUG_ON(opp_is_valid(&oppx, opp, freq)); + vc = oppx->vsel; + + /* ok to scale.. */ + sr_voltagescale_vcbypass(t_opp, c_opp, vt, vc); + } #endif } @@ -315,7 +392,8 @@ static int program_opp(int res, struct omap_opp *opp, int target_level, int resource_set_opp_level(int res, u32 target_level, int flags) { - unsigned long mpu_freq, mpu_old_freq; + unsigned long mpu_freq, mpu_old_freq, l3_freq; + int ret; #ifdef CONFIG_CPU_FREQ struct cpufreq_freqs freqs_notify; #endif @@ -334,6 +412,16 @@ int resource_set_opp_level(int res, u32 target_level, int flags) if (!mpu_opps || !dsp_opps || !l3_opps) return 0; + /* Check if I can actually switch or not */ + if (res == VDD1_OPP) { + ret = opp_to_freq(&mpu_freq, mpu_opps, target_level); + ret |= opp_to_freq(&mpu_old_freq, mpu_opps, resp->curr_level); + } else { + ret = opp_to_freq(&l3_freq, l3_opps, target_level); + } + if (ret) + return ret; + mutex_lock(&dvfs_mutex); if (res == VDD1_OPP) { @@ -341,9 +429,6 @@ int resource_set_opp_level(int res, u32 target_level, int flags) mutex_unlock(&dvfs_mutex); return 0; } - mpu_old_freq = mpu_opps[resp->curr_level].rate; - mpu_freq = mpu_opps[target_level].rate; - #ifdef CONFIG_CPU_FREQ freqs_notify.old = mpu_old_freq/1000; freqs_notify.new = mpu_freq/1000; @@ -371,15 +456,13 @@ int resource_set_opp_level(int res, u32 target_level, int flags) int set_opp(struct shared_resource *resp, u32 target_level) { - unsigned long tput; - unsigned long req_l3_freq; - int ind; + int ret = -EINVAL; if (resp == vdd1_resp) { if (target_level < 3) resource_release("vdd2_opp", &vdd2_dev); - resource_set_opp_level(VDD1_OPP, target_level, 0); + ret = resource_set_opp_level(VDD1_OPP, target_level, 0); /* * For VDD1 OPP3 and above, make sure the interconnect * is at 100Mhz or above. @@ -389,21 +472,33 @@ int set_opp(struct shared_resource *resp, u32 target_level) resource_request("vdd2_opp", &vdd2_dev, 400000); } else if (resp == vdd2_resp) { - tput = target_level; + unsigned long req_l3_freq; + struct omap_opp *oppx = NULL; /* Convert the tput in KiB/s to Bus frequency in MHz */ - req_l3_freq = (tput * 1000)/4; - - for (ind = 2; ind <= MAX_VDD2_OPP; ind++) - if ((l3_opps + ind)->rate >= req_l3_freq) { - target_level = ind; - break; + req_l3_freq = (target_level * 1000)/4; + + /* Do I have an exact match */ + ret = opp_is_valid(&oppx, l3_opps, req_l3_freq); + if (ret) { + /* Do I have a next best match */ + ret = opp_get_higher_opp(&oppx, &req_l3_freq, l3_opps); + if (ret) { + /* Give me the best we got */ + req_l3_freq = ULONG_MAX; + ret = opp_get_lower_opp(&oppx, &req_l3_freq, + l3_opps); } + } - /* Set the highest OPP possible */ - if (ind > MAX_VDD2_OPP) - target_level = ind-1; - resource_set_opp_level(VDD2_OPP, target_level, 0); + /* uh uh.. no OPPs?? */ + BUG_ON(ret); + + ret = freq_to_opp((u8 *)&target_level, l3_opps, req_l3_freq); + /* we dont expect this to fail */ + BUG_ON(ret); + + ret = resource_set_opp_level(VDD2_OPP, target_level, 0); } return 0; } @@ -416,6 +511,11 @@ int set_opp(struct shared_resource *resp, u32 target_level) */ int validate_opp(struct shared_resource *resp, u32 target_level) { + unsigned long x; + if (strcmp(resp->name, "mpu_freq") == 0) + return opp_to_freq(&x, mpu_opps, target_level); + else if (strcmp(resp->name, "dsp_freq") == 0) + return opp_to_freq(&x, dsp_opps, target_level); return 0; } @@ -425,6 +525,8 @@ int validate_opp(struct shared_resource *resp, u32 target_level) void init_freq(struct shared_resource *resp) { char *linked_res_name; + int ret = -EINVAL; + unsigned long freq; resp->no_of_users = 0; if (!mpu_opps || !dsp_opps) @@ -436,32 +538,46 @@ void init_freq(struct shared_resource *resp) */ if (strcmp(resp->name, "mpu_freq") == 0) /* MPU freq in Mhz */ - resp->curr_level = mpu_opps[curr_vdd1_opp].rate; + ret = opp_to_freq(&freq, mpu_opps, curr_vdd1_opp); else if (strcmp(resp->name, "dsp_freq") == 0) /* DSP freq in Mhz */ - resp->curr_level = dsp_opps[curr_vdd1_opp].rate; + ret = opp_to_freq(&freq, dsp_opps, curr_vdd1_opp); + BUG_ON(ret); + + resp->curr_level = freq; return; } int set_freq(struct shared_resource *resp, u32 target_level) { - unsigned int vdd1_opp; + u8 vdd1_opp; + int ret = -EINVAL; if (!mpu_opps || !dsp_opps) return 0; if (strcmp(resp->name, "mpu_freq") == 0) { - vdd1_opp = get_opp(mpu_opps + MAX_VDD1_OPP, target_level); - resource_request("vdd1_opp", &dummy_mpu_dev, vdd1_opp); + ret = freq_to_opp(&vdd1_opp, mpu_opps, target_level); + if (!ret) + ret = resource_request("vdd1_opp", &dummy_mpu_dev, + vdd1_opp); } else if (strcmp(resp->name, "dsp_freq") == 0) { - vdd1_opp = get_opp(dsp_opps + MAX_VDD1_OPP, target_level); - resource_request("vdd1_opp", &dummy_dsp_dev, vdd1_opp); + ret = freq_to_opp(&vdd1_opp, dsp_opps, target_level); + if (!ret) + ret = resource_request("vdd1_opp", &dummy_dsp_dev, + vdd1_opp); } - resp->curr_level = target_level; - return 0; + if (!ret) + resp->curr_level = target_level; + return ret; } int validate_freq(struct shared_resource *resp, u32 target_level) { + u8 x; + if (strcmp(resp->name, "mpu_freq") == 0) + return freq_to_opp(&x, mpu_opps, target_level); + else if (strcmp(resp->name, "dsp_freq") == 0) + return freq_to_opp(&x, dsp_opps, target_level); return 0; }